# SDR ASAA2020021863184

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 16, 2020
- Submitted: February 19, 2020
- Operation: Air carrier
- Aircraft: [N483AS](https://openairdocs.org/aircraft/N483AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36350
- Aircraft time: 18,125 hours, 5,810 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Indicator
- Part number: 38810521
- Condition: Failed
- Location: Apu Oil Filter
- Stage of operation: IN
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2020021863184

## Discrepancy

DURING APU GVI, FOUND THE RED BUTTON ON THE OIL FILTER INDICATOR HAS EXTENDED. GROUNDED - YES. R&R LUBE FILTER ELEMENT PER B737-900 AMM 49-91-12, BUT NO HELP. R&R OIL FILTER INDICATOR PER AMM 49-91-13. PERFORMED APU STARTING AND OPERATION PER AMM 49-11-00. OPS CHECK GOOD. NO LEAKS AND NO OTHER DEFECTS NOTED. ETOPS GROUND VERIFICATION SUCCESSFUL.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.