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A B757-200 on climb out at 11000 ft had a shudder in the turn but disappeared in level flight. Later in-flight aircraft experienced a vibration and noise. Declared an emergency and diverted and on inspection found the hydraulic service door missing.
| Attributes | |
| ACN | 405103 |
| Time | |
| Date | 199806 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : lax |
| State Reference | CA |
| Altitude | msl bound lower : 11000 msl bound upper : 11000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : lax |
| Operator | common carrier : air carrier |
| Make Model Name | B757-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | Other Other |
| Flight Phase | climbout : intermediate altitude cruise other |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : instrument |
| Experience | flight time last 90 days : 150 flight time total : 20000 flight time type : 2000 |
| ASRS Report | 405103 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : instrument pilot : commercial |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | other flight crewa |
| Resolutory Action | flight crew : declared emergency none taken : detected after the fact other |
| Consequence | other Other |
| Supplementary | |
| Primary Problem | Aircraft |
Narrative:
At approximately 11000 ft MSL aircraft shuddered while in a turn. Thought it was wake from a preceding heavy. After rollout, aircraft fine. Later, vibration and noise increased so diverted into den and found left hydraulic service door had departed the aircraft. No other problems. Callback conversation with reporter revealed the following information: the reporter stated this aircraft was an overnight layover and the hydraulic system were svced. The reporter said it was the opinion of the reporter the hydraulic service door was left open or improperly latched after servicing and missed by the first officer and the dispatch mechanic prior to departure.
Original NASA ASRS Text
Title: A B757-200 ON CLBOUT AT 11000 FT HAD A SHUDDER IN THE TURN BUT DISAPPEARED IN LEVEL FLT. LATER INFLT ACFT EXPERIENCED A VIBRATION AND NOISE. DECLARED AN EMER AND DIVERTED AND ON INSPECTION FOUND THE HYD SVC DOOR MISSING.
Narrative: AT APPROX 11000 FT MSL ACFT SHUDDERED WHILE IN A TURN. THOUGHT IT WAS WAKE FROM A PRECEDING HVY. AFTER ROLLOUT, ACFT FINE. LATER, VIBRATION AND NOISE INCREASED SO DIVERTED INTO DEN AND FOUND L HYD SVC DOOR HAD DEPARTED THE ACFT. NO OTHER PROBS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THIS ACFT WAS AN OVERNIGHT LAYOVER AND THE HYD SYS WERE SVCED. THE RPTR SAID IT WAS THE OPINION OF THE RPTR THE HYD SVC DOOR WAS LEFT OPEN OR IMPROPERLY LATCHED AFTER SVCING AND MISSED BY THE FO AND THE DISPATCH MECH PRIOR TO DEP.
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.