# SDR UIEA2021082501877

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 24, 2021
- Submitted: August 27, 2021
- Operation: Air carrier
- Aircraft: [N1997A](https://openairdocs.org/aircraft/N1997A), registered now
- Make and model: Boeing 767-33A
- Registry model: [Boeing 767-33A](https://openairdocs.org/model/boeing-767-33a) (OpenAirDocs)
- Aircraft serial: 27310
- Aircraft time: 21,104 cycles
- System (JASC): [4950 · APU Bleed Air System](https://openairdocs.org/jasc/4950)
- Part: Valve
- Part number: 97980612
- Part serial: 3178
- Condition: Faulted
- Location: Apu Pneumatic
- 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/UIEA2021082501877

## Discrepancy

APU PNEUMATICS INOP ( AUXILIARY POWER UNIT, PNEUMATIC FUNCTION )(<P>TRANSCRIBED TO MEL LIST MDDR 152437 DMI # 49-11-01-01 DUE 03SEP21, CAT C. MAINT ACTIONS C/W PER 152437. PLACARDS APPLIED.</P> / <P>25AUG21 - 1397821 - ITEM# 5 - CVG - REMOVED FLOW SENSING MODULE & INSTALLED SERVICEABLE MODULE PER AMM 49-53-08 PT SENSOR FAULT GONE. PNEUMATIC OPS CK FAILED SEE ITEM M7 FOR NEXT MX ACTIVITY. S/N OFF - 9110. P/N OFF - 3885081-1.</P> / <P>25AUG21 - 1397822 - ITEM# 7 - CVG - REMOVED APU AIR BLEED VALVE & INSTALLED SERVICEABLE VALVE PER 36-11-10. VALVE FAILED TO ACTUATE SEE ITEM 8 FOR NEXT MX ACTION. S/N OFF - 24509. P/N OFF - 2780540-101.</P> / <P>25AUG21 - 1397822 - ITEM# 8 - CVG - REMOVED APU SURGE VALVE CONTROL & INSTALLED SERVICEABLE VALVE PER 49-53-01. OPS GOOD. DMI 152437 CLEARED. </P>)

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