# SDR 2026F00163

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2026
- Submitted: July 25, 2026
- Operation: General aviation
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Power Supply
- Part number: 77233800
- Part serial: SEEBLOCK4
- Condition: None
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/2026F00163

## Discrepancy

9 UNITS OF EMERGENCY POWER SUPPLY UNIT (EPSU) P/N 772-338-00 WERE CERTIFIED FOR RELEASE TO SERVICE WITHOUT THE PART NUMBER BEING IN THE CAPABILITY LIST.   TO INCLUDE THE PART NUMBER IN THE CAPABILITY LIST AND RE-PERFORM THE MAINTENANCE AND CERTIFICATION OF THE UNITS.  CERTIFYING STAFF LAPSE ON CHECKING THE CAPABILITY LIST.

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