# SDR UIEA2021083101918

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 28, 2021
- Submitted: August 31, 2021
- Operation: Air carrier
- Aircraft: [N1399A](https://openairdocs.org/aircraft/N1399A), registered now
- Make and model: Boeing 767306
- Aircraft serial: 27959
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Isolation Valve
- Condition: Faulted
- 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/UIEA2021083101918

## Discrepancy

DURING UNLOADING LOST APU DUCT PRESSURE(<P>TRANS TO MDDR 152610 CAT C IAW DDG 49-11-01-01.</P> / <P>REF LOGPAGE 1395659 ITEM 5: FOUND ISO VALVES IN OFF POSITION,  PUSHED ISO SWITCH IN, OPS CHECK GOOD. THIS CLEARS MDDR #152610 IAW B767 AMM 49-11-00.</P>)

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