# SDR UIEA2021101102217

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 8, 2021
- Submitted: October 19, 2021
- Operation: Air carrier
- Aircraft: [N1709A](https://openairdocs.org/aircraft/N1709A), registered now
- Make and model: Boeing 767375
- Aircraft serial: 24086
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Apu
- Part number: 38002981
- Part serial: P2698
- Condition: None
- Stage of operation: NR
- How discovered: V
- Nature of condition: P
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/UIEA2021101102217

## Discrepancy

APU DUCT PRESS SURGING WHEN PNEUMATIC LOAD APPLIED TO APU(<P>PERFORMED FIM 49-11 FT. 976 TO BLOCK 8. ISSUE STILL REMAINS. TRANSFERRED TO DMI 154796 IAW DDG 36-11-04. PLACARD INSTALLED AND MX ACTIONS ACCOMPLISHED.</P> / <P>18OCT- CVG MX: LP 1387361, ITEM M15: REMOVED AND REPLACED APU IAW AMM 49-11-01, OPS CHECK OK.</P>)

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