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Flight crew of an light transport lost hydraulic quantity and system pressure resulting in manually extending the landing gear and flaps for landing. The aircraft was towed to maintenance after clearing the runway and deplaning the passenger.
| Attributes | |
| ACN | 338209 |
| Time | |
| Date | 199606 |
| Day | Fri |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : sbn |
| State Reference | IN |
| Altitude | msl bound lower : 12000 msl bound upper : 12000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Commercial Fixed Wing |
| Operating Under FAR Part | Part 121 |
| Flight Phase | cruise other |
| Route In Use | enroute airway : sbn |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 270 flight time total : 9500 flight time type : 270 |
| ASRS Report | 338209 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | flight crew : declared emergency other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
In cruise, central warning panel indicated a hydraulic problem. Hydraulic quantity was dropping as well as the main and emergency pressures. Emergency was declared and procedures completed. When gear lowered, only the nose gear indicated safely down. After pumping the emergency gear apparatus, the mains also indicated down and locked. When attempting to lower flaps, there was no movement. Pumping solved that problem also and a safe landing was made with 20 degrees flaps. Braking was normal because of the fluid in the emergency accumulator. It was possible to taxi the aircraft clear of the runway, however, the nosewheel steering was inoperative so aircraft was stopped and shut down. All passenger exited safely and were transported to terminal by bus.
Original NASA ASRS Text
Title: FLC OF AN LTT LOST HYD QUANTITY AND SYS PRESSURE RESULTING IN MANUALLY EXTENDING THE LNDG GEAR AND FLAPS FOR LNDG. THE ACFT WAS TOWED TO MAINT AFTER CLRING THE RWY AND DEPLANING THE PAX.
Narrative: IN CRUISE, CENTRAL WARNING PANEL INDICATED A HYD PROB. HYD QUANTITY WAS DROPPING AS WELL AS THE MAIN AND EMER PRESSURES. EMER WAS DECLARED AND PROCS COMPLETED. WHEN GEAR LOWERED, ONLY THE NOSE GEAR INDICATED SAFELY DOWN. AFTER PUMPING THE EMER GEAR APPARATUS, THE MAINS ALSO INDICATED DOWN AND LOCKED. WHEN ATTEMPTING TO LOWER FLAPS, THERE WAS NO MOVEMENT. PUMPING SOLVED THAT PROB ALSO AND A SAFE LNDG WAS MADE WITH 20 DEGS FLAPS. BRAKING WAS NORMAL BECAUSE OF THE FLUID IN THE EMER ACCUMULATOR. IT WAS POSSIBLE TO TAXI THE ACFT CLR OF THE RWY, HOWEVER, THE NOSEWHEEL STEERING WAS INOP SO ACFT WAS STOPPED AND SHUT DOWN. ALL PAX EXITED SAFELY AND WERE TRANSPORTED TO TERMINAL BY BUS.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.