# SDR ASAA2022021937497

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 19, 2022
- Submitted: February 23, 2022
- Operation: Air carrier
- Aircraft: [N481AS](https://openairdocs.org/aircraft/N481AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44106
- Aircraft time: 24,293 hours, 7,681 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Actuator
- Part number: 676000141
- Part serial: 676000143363
- Condition: None
- Location: Left Ramair Inle
- Part time: 24,314 hours, 7,689 cycles
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022021937497

## Discrepancy

UPON PUSHING MASTER CAUTION RECALL "AIR COND" AND LEFT "PACK" LIGHT ILLUMINATES. UPON PUSHING MASTER CAUTION RESET, "PACK" LIGHT EXTINGUISHES. GROUNDED - YES. PERFORMED PZTC REF B737-900 FIM 21-62 TASK 801 FOUND L/H SRADA INLET FAULT. DUE TO FAULT HISTORY AND ACTUATOR MAKING AN AUDIBLE "GRINDING NOISE WHILE OPERATING", REMOVED AND REPLACED RAM AIR INLET ACTUATOR REF B737-900 AMM 21-51-21. OPS CHECK GOOD.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.