Narrative:

Aircraft X was [out of service] for repeat air pack 1 reg fault. Interrogated aircraft and fault showed turbine bypass valve was faulted; replace turbine bypass valve for left pack. Upon ordering turbine bypass valve; seal rings for valve were shown not in stock. Notified crew chief and [order placed] for seal rings. Aircraft was due for flight later that night; and would not make the flight due to parts. [The] supervisor notified [the] manager and both came out to aircraft where [the] manager stated he talked with tech services and we would change the temp sensor instead of changing the turbine bypass valve. Tech services in the hangar never spoke to the amt's performing the work. He was notified that the troubleshooting showed that the valve was faulted; not the temp sensor. Later after the management visited the aircraft; it was found there was an alternate part number for the valve seal rings which were in stock and installed with the new valve.[the] manager attempted to coerce the amt's and crew chief to violate procedures and not follow what the aircraft troubleshooting manual procedures and aircraft interrogation indicated. This was done to put the aircraft back in service disregarding the fact this left pack fault was repeated on previous flights; due to the unavailability of parts. Management needs to be reminded that procedures are to be followed regardless of flight schedules due to the unavailability of parts affecting said aircraft schedules.

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Original NASA ASRS Text

Title: Maintenance Technician reported being pressured by management to replace an incorrect part to make the aircraft's scheduled departure.

Narrative: Aircraft X was [out of service] for repeat Air Pack 1 reg fault. Interrogated aircraft and fault showed turbine bypass valve was faulted; replace turbine bypass valve for left pack. Upon ordering turbine bypass valve; seal rings for valve were shown not in stock. Notified crew chief and [order placed] for seal rings. Aircraft was due for flight later that night; and would not make the flight due to parts. [The] Supervisor notified [the] Manager and both came out to aircraft where [the] Manager stated he talked with Tech Services and we would change the Temp Sensor instead of changing the turbine bypass valve. Tech Services in the hangar never spoke to the AMT's performing the work. He was notified that the troubleshooting showed that the valve was faulted; not the temp sensor. Later after the management visited the aircraft; it was found there was an alternate part number for the valve seal rings which were in stock and installed with the new valve.[The] Manager attempted to coerce the AMT's and crew chief to violate procedures and not follow what the aircraft troubleshooting manual procedures and aircraft interrogation indicated. This was done to put the aircraft back in service disregarding the fact this left pack fault was repeated on previous flights; due to the unavailability of parts. Management needs to be reminded that procedures are to be followed regardless of flight schedules due to the unavailability of parts affecting said aircraft schedules.

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.