# SDR ASAA2022100440208

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 4, 2022
- Submitted: October 10, 2022
- Operation: Air carrier
- Aircraft: [N948AK](https://openairdocs.org/aircraft/N948AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44090
- Aircraft time: 47 hours, 25 cycles
- System (JASC): [7500 · Engine Bleed Air System](https://openairdocs.org/jasc/7500)
- Part: Pressure Sensor
- Condition: Out Of Limits
- Location: Bleed System
- Stage of operation: IN
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022100440208

## Discrepancy

WHILE PERFORMING ASA T/C 31-005-00, FOUND SMT MESSAGE FAULT BLEED PM SENSOR 1 L. UNDER PRESENT LEG MAINT MSG 36-21020. ENGINE START. ENGINE -1 MANIFOLD DUCT PRESSURE SENSOR 1 SIGNAL IS OUT OF RANGE. GROUNDED - YES.  PERFORMED ASA T/C 31-005-001 AND FOUND BLEED PM SENSOR 1L FAULT LATCHED MSG. TROUBLESHOT IAW FIM TASK 36-21-00-810-803. PERFORMED ELECTRICAL LRU REPLACEMENT TEST LT AND RT IAW AMM 36-00-00-710-801. BOTH TESTS PASSED. PERFORMED T/C 31-005-00 AND NO LATCHED MSGS FOUND. MSG IS INACTIVE IN FLIGHT DECK EFFECTS PAGE.

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