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A B737-400 had a pack ram door full open light illuminated. Item deferred per MEL. Special procedures for B737-700; -800 and -900 were accomplished inadvertently.
| Attributes | |
| ACN | 727326 |
| Time | |
| Date | 200702 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-400 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 727326 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel non adherence : published procedure non adherence : far |
| Independent Detector | other other : 2 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : logbook entry performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Environmental Factor Chart Or Publication Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft X arrived ZZZ with PIREP for ram door full open light illuminated. Contract maintenance assisted in applying MEL to secure the system inoperative and secure the aircraft for flight. It was later determined by ZZZ1 maintenance that the MEL did not appear properly secured. Company ZZZ1 maintenance re-accomplished MEL procedures and accomplished required log entries. Review of office notes revealed that I had accomplished company MEL readback procedure per B737-700/-800/-900 procedure rather than the B737-200/-400. Although the intent of the maintenance procedure of disconnecting the ram door actuator control rod and electrical connector as well as securing the ram door in-flight open is the same; the nose gear procedure has the added steps of opening and re-securing the system circuit breakers. These steps were also accomplished.
Original NASA ASRS Text
Title: A B737-400 HAD A PACK RAM DOOR FULL OPEN LIGHT ILLUMINATED. ITEM DEFERRED PER MEL. SPECIAL PROCS FOR B737-700; -800 AND -900 WERE ACCOMPLISHED INADVERTENTLY.
Narrative: ACFT X ARRIVED ZZZ WITH PIREP FOR RAM DOOR FULL OPEN LIGHT ILLUMINATED. CONTRACT MAINT ASSISTED IN APPLYING MEL TO SECURE THE SYS INOP AND SECURE THE ACFT FOR FLT. IT WAS LATER DETERMINED BY ZZZ1 MAINT THAT THE MEL DID NOT APPEAR PROPERLY SECURED. COMPANY ZZZ1 MAINT RE-ACCOMPLISHED MEL PROCS AND ACCOMPLISHED REQUIRED LOG ENTRIES. REVIEW OF OFFICE NOTES REVEALED THAT I HAD ACCOMPLISHED COMPANY MEL READBACK PROC PER B737-700/-800/-900 PROC RATHER THAN THE B737-200/-400. ALTHOUGH THE INTENT OF THE MAINT PROC OF DISCONNECTING THE RAM DOOR ACTUATOR CTL ROD AND ELECTRICAL CONNECTOR AS WELL AS SECURING THE RAM DOOR INFLT OPEN IS THE SAME; THE NOSE GEAR PROC HAS THE ADDED STEPS OF OPENING AND RE-SECURING THE SYS CIRCUIT BREAKERS. THESE STEPS WERE ALSO ACCOMPLISHED.
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.