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A B737-200 was dispatched with the main landing gear maintenance isolation valve handles installed incorrectly.
| Attributes | |
| ACN | 389517 |
| Time | |
| Date | 199712 |
| Day | Mon |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz |
| State Reference | US |
| Altitude | agl bound lower : 0 agl bound upper : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-200 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | other |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | other other : other |
| ASRS Report | 389517 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other oversight : supervisor |
| Qualification | other other : other |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : far non adherence : published procedure other anomaly other |
| Independent Detector | other other : unspecified |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | other |
Narrative:
During a 'B' check, while reassembling the main landing gear isolation valve, both were installed 180 degrees from proper position. The valves passed operations check ok. Valves saftied (wired) to 'open' position as per job card. Failed to install valve safety cover. Aircraft dispatched in this manner. Later I discovered I was in error as I left the safety not secured. I notified line maintenance of my error, and they 'flagged' the error to be repaired at next opportunity. Maintenance found at dulles airport 'valve handles installed 180 degrees out.' reinstalled valve handles properly. Operations check normal. At no time, no one or aircraft was in danger.
Original NASA ASRS Text
Title: A B737-200 WAS DISPATCHED WITH THE MAIN LNDG GEAR MAINT ISOLATION VALVE HANDLES INSTALLED INCORRECTLY.
Narrative: DURING A 'B' CHK, WHILE REASSEMBLING THE MAIN LNDG GEAR ISOLATION VALVE, BOTH WERE INSTALLED 180 DEGS FROM PROPER POS. THE VALVES PASSED OPS CHK OK. VALVES SAFTIED (WIRED) TO 'OPEN' POS AS PER JOB CARD. FAILED TO INSTALL VALVE SAFETY COVER. ACFT DISPATCHED IN THIS MANNER. LATER I DISCOVERED I WAS IN ERROR AS I LEFT THE SAFETY NOT SECURED. I NOTIFIED LINE MAINT OF MY ERROR, AND THEY 'FLAGGED' THE ERROR TO BE REPAIRED AT NEXT OPPORTUNITY. MAINT FOUND AT DULLES ARPT 'VALVE HANDLES INSTALLED 180 DEGS OUT.' REINSTALLED VALVE HANDLES PROPERLY. OPS CHK NORMAL. AT NO TIME, NO ONE OR ACFT WAS IN DANGER.
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.