# SDR ASAA2023012641684

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 26, 2023
- Submitted: January 31, 2023
- Operation: Air carrier
- Aircraft: [N433AS](https://openairdocs.org/aircraft/N433AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 41704
- Aircraft time: 34,249 hours, 10,831 cycles
- Engine: Cfmint CFM567B27E
- System (JASC): [7532 · Compressor Bleed Valve](https://openairdocs.org/jasc/7532)
- Part: Bleed Valve
- Part number: 32022221
- Part serial: 15301
- Condition: Inoperative
- Location: Nr 1 Engine
- Part time: 32,431 hours, 10,243 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023012641684

## Discrepancy

WHILE ATTEMPTING TO START ENGINE #2 (CROSSBLEED START) WITH DUCT PRESSURE ABOVE 30+ PSI THE START FAILED. EGT FLASHING WHITE BOX. PER PDX LINE MX DIRECTION SWITCH IGN TO LEFT AND ATTEMPTED A SECOND START WITH MORE N1. THAT START ALSO FAILED. GROUNDED - YES. ACCOMPLISHED TSR713743 FOR #2 ENGINE HUNG START. 3 SUCCESSFUL CROSSBLEED STARTS ON #2 ENGINE PER MM 71-00-00. REMOVED AND REPLACED BLEED AIR CHECK VALVE ON #2 ENGINE PER B737-900 AMM 36-11-02. LEAK CHECKED GOOD. #1 ENG 5TH STAGE BLEED AIR CHECK VALVE FAILED INSP CHECK. REMOVED AND REPLACED #1 ENG 5TH STAGE BLEED AIR CHECK VALVE PER MM 36-11-02. 15732 FOUND #1 ENG PRSOV LEAKING. OPENED 2EA CB'S REMOVED AND REPLACED #1 ENG PRSOV. CLOSED 2EA CB'S AND REMOVED TAGS. LEAK AND OPS CK GOOD REF MM 36-11-04. NO FAULTS NOTED.

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