# SDR ASAA2019121633613

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 13, 2019
- Submitted: December 17, 2019
- Operation: Air carrier
- Aircraft: [N434AS](https://openairdocs.org/aircraft/N434AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 61620
- Aircraft time: 14,837 hours, 4,711 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Line
- Condition: Leaking
- Location: Oil System
- Stage of operation: IN
- How discovered: O
- Nature of condition: K
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2019121633613

## Discrepancy

REF L/P 1209698 ETOPS OIL SERVICED, PER SEAMC APU OIL CONSUMPTION LIMITS MAY HAVE BEEN EXCEEDED. GROUNDED - YES. PERFORMED GVI OF DRAIN MAST PER B737-900 AMM 49-16-11. FOUND BOTTOM TEMP CONTROL VALVE LINE LEAKING. REMOVE BOTTOM LINE AND FOUND O RINGS TEAR. REPLACED O RINGS PER AMM 49-91-21. NO LEAKS NOTED AT THIS TIME. NO CURRENT FAULTS FOUND AT THIS TIME. PER E05-00-11 APU OILS CONSUMPTION RATE IS NOT WITHIN LIMITS. SEAMC CONTACTED REF L/P 12096985 FOR TOP DEFERRAL.

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