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B737 maintenance technician reported they did not have the proper diagnostic tool to test the air conditioning system as required.
| Attributes | |
| ACN | 1412157 |
| Time | |
| Date | 201612 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B737 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Air Conditioning and Pressurization Pack |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Less Severe Deviation - Procedural MEL Deviation - Procedural Published Material / Policy |
Narrative:
Aircraft was assigned #2 service check. The aircraft had an open log item with a fault message pack airflow/temperature diagnostics tool. Tool shows pack airflow is too low or too high. Pulled up the info for this fault; step east instructs you to accomplish pack flow control and pack cooling system check per aircraft maintenance manual (amm). Amm instructs you to use the air pack diagnostic tool. This tool is not available in ZZZ. The tool is also not available in the entire system. Contacted maintenance control about this item to defer and was told by them it was not deferrable and to not clear the code without the proper tooling. Management was notified of this issue; unable to defer per maintenance control because we did not know which pack may have been the problem. Aircraft was scheduled to depart at xa:55. Updated item for low flow at flight deck. Was contacted by manager that he was under pressure to clear fault for the departure and if it was not cleared then I and my lead would be held for disciplinary actions for setting on the item and not letting management know of the problem until late. Cleared the item and notified management that a maintenance safety report would be filed.
Original NASA ASRS Text
Title: B737 Maintenance Technician reported they did not have the proper diagnostic tool to test the air conditioning system as required.
Narrative: Aircraft was assigned #2 service check. The aircraft had an open log item with a fault message pack airflow/temperature diagnostics tool. Tool shows pack airflow is too low or too high. Pulled up the info for this fault; Step E instructs you to accomplish pack flow control and pack cooling system check per Aircraft Maintenance Manual (AMM). AMM instructs you to use the air pack diagnostic tool. This tool is not available in ZZZ. The tool is also not available in the entire system. Contacted Maintenance Control about this item to defer and was told by them it was not deferrable and to not clear the code without the proper tooling. Management was notified of this issue; unable to defer per Maintenance Control because we did not know which pack may have been the problem. Aircraft was scheduled to depart at XA:55. Updated item for low flow at flight deck. Was contacted by manager that he was under pressure to clear fault for the departure and if it was not cleared then I and my lead would be held for disciplinary actions for setting on the item and not letting Management know of the problem until late. Cleared the item and notified management that a Maintenance safety report would be filed.
Data retrieved from NASA's ASRS site 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.