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A B737-700 had a hydraulic leak on a #2 engine thrust reverser actuator only when actuated to the full open stop. Leak checked within maintenance manual limits.
| Attributes | |
| ACN | 713574 |
| Time | |
| Date | 200610 |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 713574 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Events | |
| Anomaly | aircraft equipment problem : less severe |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft Chart Or Publication Environmental Factor Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
Air carrier X had a hydraulic leak on #2 engine thrust reverser. It was only leaking when it was deployed. I signed it off as 'item addressed on pilot reference log page.' accomplished again leak check; same results approximately 12 drops per min. In accordance with maintenance manual 29-00-00. Note: noticed leaking only when cycled; stops when closed or open. Verified leaking from 4 O'clock position thrust reverser actuator #2 engine. It appears that the way I signed it off it was leaking when it was in transit. I would have then incorrectly signed it off because it would have been out of limits. The signoff should have stated that it is dripping 12 drops a min when fully open and it only leaks after it has been cycled after it is fully open. Not sure if this is a big deal just making sure.
Original NASA ASRS Text
Title: A B737-700 HAD A HYD LEAK ON A #2 ENG THRUST REVERSER ACTUATOR ONLY WHEN ACTUATED TO THE FULL OPEN STOP. LEAK CHKED WITHIN MAINT MANUAL LIMITS.
Narrative: ACR X HAD A HYD LEAK ON #2 ENG THRUST REVERSER. IT WAS ONLY LEAKING WHEN IT WAS DEPLOYED. I SIGNED IT OFF AS 'ITEM ADDRESSED ON PLT REF LOG PAGE.' ACCOMPLISHED AGAIN LEAK CHK; SAME RESULTS APPROX 12 DROPS PER MIN. IN ACCORDANCE WITH MAINT MANUAL 29-00-00. NOTE: NOTICED LEAKING ONLY WHEN CYCLED; STOPS WHEN CLOSED OR OPEN. VERIFIED LEAKING FROM 4 O'CLOCK POS THRUST REVERSER ACTUATOR #2 ENG. IT APPEARS THAT THE WAY I SIGNED IT OFF IT WAS LEAKING WHEN IT WAS IN TRANSIT. I WOULD HAVE THEN INCORRECTLY SIGNED IT OFF BECAUSE IT WOULD HAVE BEEN OUT OF LIMITS. THE SIGNOFF SHOULD HAVE STATED THAT IT IS DRIPPING 12 DROPS A MIN WHEN FULLY OPEN AND IT ONLY LEAKS AFTER IT HAS BEEN CYCLED AFTER IT IS FULLY OPEN. NOT SURE IF THIS IS A BIG DEAL JUST MAKING SURE.
Data retrieved from NASA's ASRS site as of January 2009 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.