Hydraulics
HSC AUTO FAIL
1. HYD SYSTEM SELECT SWITCH - MANUAL
- Set the HYD SYSTEM SELECT switch to the MANUAL position.
2. HYD SYSTEM SELECT SWITCH - AUTO
- Set the HYD SYSTEM SELECT switch to the AUTO position.
HSC AUTO FAIL ALERT DISPLAYED
IF HSC AUTO FAIL DOES NOT DISPLAY, SKIP TO MAKE LOG ENTRY
3. HYD SYSTEM SELECT SWITCH - MANUAL
- Set the HYD SYSTEM SELECT switch to the MANUAL position.
Continue flight with system in manual.
[END HSC AUTO FAIL CHECKLIST]
Make log entry.
[END HSC AUTO FAIL CHECKLIST]
HYD ALERTS
AIRCRAFT ON GROUND
IF IN AIR, SKIP TO STEP 2
1. CONTACT MAINTENANCE
- Contact maintenance for aircraft repairs
[END HYD ALERTS CHECKLIST]
2. FIRST OFFICER'S EIS SOURCE SELECTOR - AUX (OR 1)
- Set the first officers EIS SOURCE Selector to AUX (OR 1)
HYD ALERTS REMAIN DISPLAYED
IF HYD ALERTS DO NOT REMAIN DISPLAYED, SKIP TO HYDRAULIC ALERTS AND SYSTEM DISPLAY WILL OPERATE NORMALLY
3. FIRST OFFICER'S EIS SOURCE SELECTOR - ORIGINAL POSITION
- Set the first officers EIS SOURCE Selector to ORIGINAL position.
NOTE
Some subsequent hydraulic system faults will not present alerts on EAD or illuminate MASTER WARNING/CAUTION lights; however, annunciator lights on overhead panel are operative.
[END HYD ALERTS CHECKLIST]
Hydraulic alerts and system display will operate normally.
[END HYD ALERTS CHECKLIST]
HYD 1 FAIL
NOTE
Outboard slats will not retract if they were extended before the loss of pressure occurred. “SLAT DISAG” alert will be displayed when flap/slat handle is in the UP/RET position.
HYD 3 ELEV OFF ALERT DISPLAYED
IF HYD 3 ELEV OFF IS NOT DISPLAYED, SKIP TO STEP 2
1. LAND AT NEAREST SUITABLE AIRPORT
- Landing at the nearest suitable airport for aircraft repair.
[END HYD 1 FAIL CHECKLIST]
2. AUTO BRAKE SELECTOR - OFF
- Set the AUTO BRAKE SELECTOR to the OFF position.
Plan a 35 / EXT landing.
[END HYD 1 FAIL CHECKLIST]
HYD 2 FAIL
HYD 3 ELEV OFF ALERT DISPLAYED
IF HYD 3 ELEV OFF IS NOT DISPLAYED, SKIP TO PLAN A 35 / EXT LANDING
1. LAND AT NEAREST SUITABLE AIRPORT
- Landing at the nearest suitable airport for aircraft repair.
Lower rudder is inoperative.
VCMA is 180 KIAS
CAUTION
Do not attempt a go-around at speeds below VCMA.
Recommended maximum crosswind component is 12 knots.
Plan a 35 / EXT landing.
[END HYD 2 FAIL CHECKLIST]
HYD 3 FAIL
NOTE
Outboard slats will not retract if they were extended before the loss of pressure occurred. “SLAT DISAG” alert will be displayed when flap/slat handle is in the UP/RET position.
Plan a 35/EXT landing.
Autoland is not approved. Autopilot must be disconnected by 100 ft RA.
Auto go-around is not recommended.
Wait until gear extension is required
1. INDICATED AIRSPEED - MAX 230 KIAS
- Ensure your indicated airspeed does not pass 230 KIAS
2. ALTERNATE GEAR EXTENSION LEVER - RAISE / LATCH
- Set the ALTERNATE GEAR EXTENSION LEVER to the RAISE / LATCH position.
3. GEAR LIGHTS - 3 GREEN
- Monitor the gear lights, ensure there are 3 greens.
CAUTION
After alternate extension of the main gear, wait until gear is extended before next action.
4. CENTER GEAR ALTERNATE EXTENSION HANDLE - PULL
- PULL the CENTER GEAR ALTERNATE EXTENSION HANDLE.
5. GEAR LIGHTS - 4 GREEN
- Monitor the gear lights, ensure there are 4 greens.
6. GEAR HANDLE - DOWN
- Set the GEAR HANDLE to the DOWN position.
7. AUTO BRAKE SELECTOR - OFF
- Set the AUTO BRAKE SELECTOR to the OFF position.
8. AUTOPILOT - DISCONNECT BY 100 FEET RA
- Disconnect the autopilot by 100 FEET RA.
[END HYD 3 FAIL CHECKLIST]
HYD 1 & 2 FAIL
NOTES
- Increased fuel consumption up to approximately 15% may result in due to control surface float.
- The "LSAS ALL FAIL" Level 2 alert will be displayed and LSAS channels cannot be restored.
- Outboard slats will not retract if they were extended before the loss of pressure occurred. "SLAT DISAG" alert will be displayed when flap / slat handle is in the UP / RET position.
VMCA IS 160 KIAS
"HYD 3 ELEV OFF" ALERT DISPLAYED
IF "HYD 3 ELEV OFF" ALERT NOT DISPLAYED, SKIP TO "RUDDER BOTH INOP" ALERT DISPLAYED
- Elevators are inoperative. Pitch control is available from engine thrust and/or stabilizer trim (one-half rate).
- Rudders are inoperative. Directional control is available from ailerons, spoilers and engine thrust.
- Initial approach altitude of 4,000 ft is recommended for early stabilization on speed and thrust.
- To flare the aircraft, make a small stabilizer nose up adjustment and close throttles just before touch down. Do not attempt to make a smooth landing.
- Upon main gear touch down, apply full brakes and move stabilizer nose down to counteract nose up movement as result of spoiler extension.
"RUDDER BOTH INOP" ALERT DISPLAYED
IF "RUDDER BOTH INOP" ALERT NOT DISPLAYED, SKIP TO FLAPS EXTENDED
- Directional control is available from ailerons, spoilers and engine thrust.
- If a wing engine is shut down, a go-around should not be attempted.
FLAPS EXTENDED
IF FLAPS NOT EXTENDED, SKIP TO STEP 1
- Leave FLAP/SLAT handle in existing position.
1. GPWS SWITCH - FLAP OVRD
- Move the GPWS switch to the FLAP OVRD position.
2. LAND AT NEAREST SUITABLE AIRPORT
- Landing at the nearest suitable airport for aircraft repair.
3. REDUCE GROSS WEIGHT AS DESIRED
- Reduce gross weight as is desired by the crew.
REVIEW EFFECTS ON CONTROLLABILITY
| Parameter | Description |
|---|---|
| AUTOPILOT | Both autopilots are inoperative. |
| AUTOTHROTTLES | May be used for approach but must be disconnected before 50 feet RA if flaps are not in the landing configuration. |
| RUDDER | Upper rudder is inoperative. VMCA is 160 KIAS. Recommended maximum crosswind is 12 kts. Lower rudder is operative through 3-2 nonreversible motor pump if "HYD 3 ELEV OFF" alert is not displayed. If alert is displayed, both rudders are inoperative. |
| FLAPS | Inoperative. |
| SLATS | Slats may not extend until speed is reduced. |
| LANDING GEAR | Use alternate landing gear extension to avoid high demand on hydraulic system 3. |
| SPOILERS | Only one spoiler panel on each wing is operative. With only one hydraulic system operating, spoiler drive system may not have enough power to move handle to ground spoiler position. |
| NOSEWHEEL STEERING | Limited to 25° to left and 70° (full) to right. |
| BRAKES | System 1 accumulator only; system 2 full brakes. Anti-skid is operative. |
| AUTO BRAKES | Do not use. Hydraulic systems 1 and 3 required for normal auto brake operations |
| ELEVATORS | Inboard elevators are operative if "HYD 3 ELEV OFF" alert is not displayed. If displayed, all elevators are inoperative. |
| AILERONS | Operative. Normal operation is available through hydraulic system 3. |
| STAB TRIM | One-half the normal rate is available. Use trim system sparingly (short periods only). |
APPROACH ASPECTS
FLAPS RETRACTED
IF FLAPS NOT RETRACTED, SKIP AFTER TABLE
- Multiply landing distance by 1.3
0/EXT APPROACH SPEEDS
| Weight (1000 Kg) | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 |
|---|---|---|---|---|---|---|---|---|
| VAPP (VREF + 15) | 167 | 172 | 176 | 181 | 185 | 189 | 193 | 197 |
Use normal descent and approach checklist.
Plan for a long final approach.
Use alternate gear extension.
LANDING ASPECTS
-
Maintain VMCA 160 KIAS until landing is assured, then reduce speed to VAPP.
-
Do not use autothrottles below 50 feet RA.
-
Cross threshold at VAPP, reduce sink rate slightly and fly a positive touchdown. Do not hold aircraft off. Reduce thrust to idle at touchdown. Excessive flare will result in float and excessive use of runway.
CAUTION
Tail strike may occur at pitch attitudes greater than 10°
ROLL-OUT ASPECTS
- Spoilers will deploy after nose gear touchdown. Assist spoiler handle to the GROUND SPOILER position
- Apply manual braking.
GO-AROUND ASPECTS
- Initial rotation to 15°, then adjust pitch attitude to maintain speed.
- Speed VMIN + 15.
- Do not retract gear. If gear retraction is required, delay until clear of obstacles.
- Do not retract slats.
Wait until ready for approach
4. FLAP / SLAT HANDLE - 0/EXT OR LEAVE IN EXISTING POSITION
- Move the flap / slat handle to 0 / EXT or leave them in their current configuration.
NOTE
Slats may not extend until speed is reduced
Wait until ready to extend landing gear
5. AIRSPEED - MAX 230 KIAS
- Monitor Airspeed prior to gear deployment ensuring it is 230 KIAS or less.
6. ALTERNATE GEAR EXTENSION LEVER - RAISE / LATCH
- Move the alternate gear extension lever to the RAISED / LATCHED position.
Wait until 3 green lights illuminate
7. CENTER GEAR ALTERNATE EXTENSION HANDLE / LIGHTS - PULL / 4 GREEN
- Pull the center gear alternate extension handle and ensure that all lights are green before continuing.
8. GEAR HANDLE - DOWN
- Pull the gear handle into the DOWN position.
Wait 2 minutes
9. ALTERNATE GEAR EXTENSION LEVER - STOW
- Move the alternate gear extension lever to the STOW position.
10. AUTO BRAKE SELECTOR - OFF
- Move the autobrake selector to the OFF position.
QRH LANDING CHECKLIST
[END OF HYD 1 & 2 FAIL]
HYD 1 & 3 FAIL
NOTE
Increased fuel consumption up to approximately 15% may result in due to control surface float.
VMCA is 140 KIAS.
"RUDDER BOTH INOP" ALERT DISPLAYED
IF "RUDDER BOTH INOP" ALERT IS NOT DISPLAYED, SKIP TO STEP 1
- VMCA is 160 KIAS.
- Recommended maximum crosswind component is 12 knots.
- Stabilizer is inoperative.
- Complete Abnormal Non-Alert procedure - STABILIZER INOPERATIVE, then continue with this procedure.
1. LAND AT NEAREST SUITABLE AIRPORT
- Landing at the nearest suitable airport for aircraft repair.
2. REDUCE GROSS WEIGHT AS DESIRED
- Reduce gross weight as is desired by the crew.
REVIEW EFFECTS ON CONTROLLABILITY
| Parameter | Description |
|---|---|
| AUTOPILOT | Autopilot 1 may be used but manual aircraft trimming must be accomplished for speed or configuration changes. |
| AUTOTHROTTLES | May be used for approach but must be disconnected before 50 ft RA if flaps are not in the landing configuration. |
| RUDDER | Operative through the 2-1 nonreversible motor pump; VMCA is 140 KIAS. If "RUDDER UPR INOP" alert is displayed, VMCA is 160 KIAS. Recommended maximum crosswind component is 12 kts. |
| FLAPS | Flaps may not extend until speed is reduced. |
| SLATS | Inoperative. If second system failure occurred with slats extended, do not attempt to retract slats. |
| LANDING GEAR | Use alternate landing gear extension. Retraction not possible. |
| SPOILERS | Two spoiler panels on each wing are operative. |
| NOSEWHEEL STEERING | Inoperative. |
| BRAKES | Accumulators only. Anti-skid is operative. |
| AUTO BRAKES | Do not use auto brakes. Brake pressure limited to accumulator pressure only. |
| ELEVATORS | Three elevators operative. |
| AILERONS | All are operative except right inboard. |
| STAB TRIM | Available through the 2-1 nonreversible motor pumps, if "RUDDER UPR INOP" alert is not displayed. One-half normal rate is available. No auto trim. Use trim system sparingly (short periods only). |
APPROACH ASPECTS
SLATS RETRACTED
IF SLATS ARE EXTENDED, SKIP TO "IF SLATS ARE EXTENDED, PLAN A 35/EXT APPROACH AND LANDING"
3. SLAT STOW SWITCH - SLAT STOW
- Move the SLAT STOW switch to the SLAT STOW position.
4. FLAP / SLAT HANDLE - 0 / EXT POSITION
- Move the flap/slat handle to the 0 / EXT position.
5. GPWS SWITCH - FLAP OVRD
- Move the GPWS Switch to the FLAP OVRD position.
Plan a 28 / RET approach and landing.
Multiply landing distance by 1.6.
28/RET APPROACH SPEEDS
| Weight (1000 Kg) | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 |
|---|---|---|---|---|---|---|---|---|
| VAPP (VREF + 5) | 175 | 180 | 185 | 190 | 195 | 200 | 205 | 209 |
- If slats are extended, plan a 35 / EXT approach and landing.
- Use normal descent and approach checklists.
- Plan for a long final approach. Configure aircraft early as flap extension is slower than normal and might be limited.
- Request towing equipment.
LANDING ASPECTS
- Cross threshold at VAPP, reduce sink rate slightly. Disconnect autothrottles if landing flap setting is less than 35°. Retard throttles to idle and raise nose of aircraft to at least level attitude. Do not hold aircraft off. Excessive flare will result in float and excessive use of runway
CAUTION
Tail strike may occur at pitch attitudes greater than 10°
ROLL-OUT ASPECTS
- Spoilers will deploy after nose gear touchdown.
- Assist spoiler handle to the GROUND SPOILER position.
- Do not cycle brakes.
GO-AROUND ASPECTS
- Initial rotation to 15°, then adjust pitch attitude to maintain speed.
- Speed greater of VMIN + 5 or 180 KIAS.
- Gear retraction not possible.
- Clean up procedure with slats retracted:
- Initially flaps 10.
- When passing VSR, Flap/Slat Handle 0/EXT.
Wait until ready for approach
6. FLAP / SLAT HANDLE - 28 / EXT POSITION
- Move the FLAP / SLAT Handle to the 28 / EXT position.
Wait until ready to extend landing gear
7. AIRSPEED - MAX 230 KIAS
- Monitor Airspeed prior to gear deployment ensuring it is 230 KIAS or less.
8. ALTERNATE GEAR EXTENSION LEVER - RAISE / LATCH
- Move the alternate gear extension lever to the RAISED / LATCHED position
Wait until 3 green lights illuminate
9. CENTER GEAR ALTERNATE EXTENSION HANDLE / LIGHTS - PULL / 4 GREEN
- Pull the center gear alternate extension handle and ensure that all lights are green before continuing.
10. GEAR HANDLE - DOWN
- Pull the gear handle into the DOWN position.
11. ALTERNATE GEAR EXTENSION LEVER - STOW
- Move the alternate gear extension lever to the STOW position.
12. AUTO BRAKE SELECTOR - OFF
- Move the autobrake selector to the OFF position.
QRH LANDING CHECKLIST
[END OF HYD 1 & 3 FAIL]
HYD 2 & 3 FAIL
NOTES
- Increased fuel consumption up to approximately 15% may result in due to control surface float.
- Outboard slats will not retract if they were extended before the loss of pressure occurred. "SLAT DISAG" alert will be displayed when flap / slat handle is in the UP / RET position.
- Lower rudder is inoperative.
VMCA is 180 KIAS.
CAUTION
Do not attempt a go-around at speeds below VMCA.
Recommended maximum crosswind component is 12 knots.
1. LAND AT NEAREST SUITABLE AIRPORT
- Landing at the nearest suitable airport for aircraft repair.
2. REDUCE GROSS WEIGHT AS DESIRED
- Reduce gross weight as is desired by the crew.
REVIEW EFFECTS ON CONTROLLABILITY
| Parameter | Description |
|---|---|
| AUTOPILOT | Autopilot 1 inoperative. |
| AUTOTHROTTLES | May be used for approach but must be disconnected before 50 feet RA. |
| RUDDER | Lower rudder inoperative. VMCA is 180 KIAS. Recommended max crosswind 12 kt. |
| FLAPS | Flaps may not fully extend until speed is reduced. |
| SLATS | Slats may not fully extend until speed is reduced. |
| LANDING GEAR | Use alternate landing gear extension. Retraction not possible |
| SPOILERS | Two spoiler panels on each wing are operative. With only one hydraulic system operating, spoilers drive may not have enough power to move handle to ground spoiler position. |
| NOSEWHEEL STEERING | Limited to 25° degrees to the right and 70° (full) to left. |
| BRAKES | System 1 full pressure; system 2 accumulator only. Anti-skid is operative. |
| AUTO BRAKES | Do not use. Hydraulic systems 1 and 3 required for normal auto brake operation. |
| ELEVATORS | Three elevators operative. |
| AILERONS | Right inboard aileron operative. |
| STAB TRIM | One-half the normal rate is available. Use trim system sparingly (short periods only). |
APPROACH ASPECTS
- Use normal descent and approach checklists
- Multiply landing distance by 1.2.
- Landing is with flaps/slats 28/EXT.
- Plan for a long final approach. Configure aircraft early as flap extension is slower than normal and might be limited.
28/EXT APPROACH SPEEDS
| Weight (1000 Kg) | 160 | 170 | 180 | 190 | 200 | 210 | 220 | 230 |
|---|---|---|---|---|---|---|---|---|
| VAPP (VREF + 8) | 148 | 153 | 157 | 161 | 165 | 169 | 173 | 176 |
LANDING ASPECTS
- Maintain VMCA 180 KIAS until landing is assured, then reduce speed to VAPP for existing configuration.
- Cross threshold at VAPP, reduce sink rate slight. Disconnect autothrottles, retard throttles to idle and fly to a positive touchdown. Do not hold aircraft off.
- Excessive flare will result in float and excessive use of runway.
CAUTION
Tail strike may occur at pitch attitudes greater than 10°
ROLL-OUT ASPECTS
- Spoilers will deploy after nose gear touchdown. Assist spoiler handle to the GROUND SPOILER position.
- Apply manual braking.
GO-AROUND ASPECTS
- Initial rotation to 15°, then adjust pitch attitude to maintain speed.
- Gear retraction not possible.
- Do not retract slats.
CAUTION
Do not attempt a go-around at speeds below VMCA (180 KIAS)
Wait until ready for approach
3. GPWS SWITCH - FLAP OVRD
- Move the GPWS switch to the FLAP OVRD position
4. FLAP / SLAT HANDLE - 28 / EXT POSITION
- Move the FLAP / SLAT Handle to the 28 / EXT position.
Wait until ready to extend landing gear
5. AIRSPEED - MAX 230 KIAS
- Monitor Airspeed prior to gear deployment ensuring it is 230 KIAS or less.
6. ALTERNATE GEAR EXTENSION LEVER - RAISE / LATCH
- Move the alternate gear extension lever to the RAISED / LATCHED position
Wait until 3 green lights illuminate
7. CENTER GEAR ALTERNATE EXTENSION HANDLE / LIGHTS - PULL / 4 GREEN
- Pull the center gear alternate extension handle and ensure that all lights are green before continuing.
8. GEAR HANDLE - DOWN
- Pull the gear handle into the DOWN position.
9. ALTERNATE GEAR EXTENSION LEVER - STOW
- Move the alternate gear extension lever to the STOW position.
10. AUTO BRAKE SELECTOR - OFF
- Move the autobrake selector to the OFF position.
QRH LANDING CHECKLIST
[END OF HYD 2 & 3 FAIL]
HYD PRES HI
HYDRAULIC SYSTEM IN MANUAL MODE
IF HYDRAULIC SYSTEM IS IN AUTO, SKIP TO MAKE LOG ENTRY
1. ASSOCIATED HYD SYS L PUMP SWITCH - OFF
- Set the associated HYD SYS L PUMP switch to the OFF position.
HYD PRES HIGH ALERT REMAINS DISPLAYED
IF HYD PRES HIGH ALERT IS NO LONGER DISPLAYED, SKIP TO END HYD PRES HIGH CHECKLIST
2. ASSOCIATED HYD SYS L PUMP SWITCH - ON
- Set the associated HYD SYS L PUMP switch to the ON position.
Make Log entry.
NOTE
If alert remains displayed, system pressure sensor has failed.
[END HYD PRES HI CHECKLIST]
HYD PRES LO
1. AFFECTED HYD PUMP SWITCH(ES) - OFF
- Set the affected HYD PUMP switch(es) to the OFF position.
Repressurize system for approach and landing.
SYSTEM DOES NOT REPRESSURIZE
IF SYSTEM DOES REPRESSURIZE, SKIP TO END HYD PRES LO CHECKLIST
2. REFER TO ABNORMAL ALERT PROCEDURE - HYD 1 FAIL, HYD 2 FAIL OR HYD 3 FAIL AS APPROPRIATE
- Refer to the Abnormal Alert Procedure - HYD 1 FAIL, HYD 2 FAIL, or HYD 3 FAIL, as appropriate.
[END HYD PRES LO CHECKLIST]
HYD QTY LO
1. AFFECTED HYD SYS PUMP AND RMP SWITCHES - OFF
- Set the affected HYD SYS PUMP AND RMP SWITCHES to the OFF position.
NOTE
Hydraulic system may be used for approach and landing.
[END HYD QTY LO CHECKLIST]
HYD TEMP HI
AIRCRAFT IN FLIGHT
IF THE AIRCRAFT IS NOT IN FLIGHT, SKIP TO STEP 2
If phase of flight permits:
1. AFFECTED HYD SYS PUMP AND RMP SWITCHES - OFF
- Set the affected HYD SYS PUMP AND RMP SWITCHES to the OFF position.
NOTE
Hydraulic system may be used for approach and landing.
[END HYD TEMP HI CHECKLIST]
2. FLIGHT CONTROLS - CYCLE
- CYCLE the flight controls.
NOTE
Cycling flight controls, with affected engine hydraulic pumps operating, will circulate and cool hydraulic fluid and may cause “HYD TEMP HI” alert to extinguish. If alert remains displayed, contact maintenance.
[END HYD TEMP HI CHECKLIST]