# SDR UIEA2019020103082

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 1, 2019
- Submitted: February 6, 2019
- Operation: Air carrier
- Aircraft: [N1439A](https://openairdocs.org/aircraft/N1439A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 28495
- Aircraft time: 68,809 hours, 15,968 cycles
- System (JASC): [4920 · APU Core Engine](https://openairdocs.org/jasc/4920)
- Part: Control Valve
- Part number: 97980612
- Part serial: 1933C
- Condition: Malfunctioned
- Location: Apu Surge
- Stage of operation: TX
- How discovered: O
- Nature of condition: J
- Precautionary procedure: D
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2019020103082

## Discrepancy

AIR PRESSURE FROM APU NOT STABLE DURING ENGINE START.UNABLE TO GET STABILIZED N2(<P>TRANSFERRED TO MDDR 106753 IAW DDG 49-11-01A, CAT C DUE 11FEB19 .</P><P>R/R SURGE CONTROL VALVE PER AMM 49-53-01. OPS CK GOOD.

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