# SDR ASAA2023092045225

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 20, 2023
- Submitted: September 21, 2023
- Operation: Air carrier
- Aircraft: [N291BT](https://openairdocs.org/aircraft/N291BT), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 44088
- Aircraft time: 8,393 hours, 2,414 cycles
- System (JASC): [3610 · Pneumatic Distribution System](https://openairdocs.org/jasc/3610)
- Part: Valve
- Part number: 632920682
- Part serial: 60A153
- Condition: Damaged
- Location: #1 Engine
- Part time: 8,393 hours, 2,414 cycles
- Stage of operation: IN
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023092045225

## Discrepancy

WHILE ACCOMPLISHING TASK CARD #72-ASA-03 FOUND HIGH PRESSURE SHUTOFF VALVE HPSOV ON #1 ENG LOCKOUT BOLT DAMAGED FROM VALVE. 3 CD PULLED ENG #1 SPAR VLV, ENG #1 IGN L AND IGN R. GROUNDED - YES. PERFORMED ALTERNATE DEACTIVATION PER ASA CHAP 5-07-01 TABLE 3 ITEM 7 51122.REMOVED THE ENG #1 HPSOV REF AMM 36-11-07 INSTALLED NEW HPSOV REF AMM 36-11-07-4--=801 STEPS A THRU H2 RESET 3 CBS 51122 9/20/23. PERFORMED OPERATIONAL CK AND LEAK CK PER AMM 36-11-07 OPS CKS GOOD LW 77617 ALTERNATE DEACTIVATION REVERSED.

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