# SDR CALA2026030314261

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 2, 2026
- Submitted: March 3, 2026
- Operation: Air carrier
- Aircraft: [N36280](https://openairdocs.org/aircraft/N36280), registered now
- Make and model: Boeing 737824
- Aircraft serial: 31598
- Aircraft time: 64,348 hours, 23,903 cycles
- System (JASC): [2497 · Electrical Power System Wiring](https://openairdocs.org/jasc/2497)
- Part: Circuit Breaker
- Condition: Open
- Location: Zone 200
- Stage of operation: TX
- How discovered: O
- Nature of condition: B
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2026030314261

## Discrepancy

NO DUCT PRESSURE ON APU.  NO DUAL BLEED LIGHT.  REQUESTING PER MEL 4907A. C/W DDP.   APPROVED MEL 4907A.  APPLIED STICKER. RT A/C PACK OPS TEST NO PRESSURE.  PERFORMED BLEED AIR ISOLATION TEST.  CLOSED ALL A/C PACK CONTROL AND ISOLATION VALVE CIRCUIT BREAKERS.  OPS TEST NOW GOOD IAW AMM 36-13-00-710-801.

---
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.