# SDR ASAA2023071944124

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 19, 2023
- Submitted: July 24, 2023
- Operation: Air carrier
- Aircraft: [N428AS](https://openairdocs.org/aircraft/N428AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36353
- Aircraft time: 27,013 hours, 8,467 cycles
- System (JASC): [7500 · Engine Bleed Air System](https://openairdocs.org/jasc/7500)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- 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/ASAA2023071944124

## Discrepancy

WHILE ACCOMPLISHING TASK CARD # 78273000 FOUND SHORT TIME FAULT CODE # 75-30451 "THE VBV POSITION SIGNALS DISAGREE" ON ENG #1. GROUNDED - YES. (RESOLVED ON W/O: 1961389 TASKCARD: N/R-00003 ) DURING FLT FAULT CHECKED, NO FAULTS LOGGED IN HISTORY PAGE. ACCOMPLISHED VBV RING PAD INSPECTION, FOUND ONE PAD LOOSE, REMOVED REF MM 75-32-00-200-801-F00. ACCOMPLISHED EEC BITE TEST, NO FAULTS LOGGED, OPS NML REF MM 73-21-00-700-804-F00. ACCOMPLISHED ACTUATOR TEST, NO FAULTS, TEST PASSED REF MM 71-00-00-700-807-F00. THIS CLEARS PLT, SEAMC " PETER " NOTIFIED.

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