# SDR 2021F00116

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 12, 2021
- Submitted: May 12, 2021
- Operation: General aviation
- Aircraft: [N520QS](https://openairdocs.org/aircraft/N520QS), registered now
- Make and model: Cessna 680A
- Registry model: [Cessna 680A](https://openairdocs.org/model/cessna-680a) (OpenAirDocs)
- Aircraft serial: 680A0056
- Aircraft time: 3,984 hours, 2,675 cycles
- Engine: Pwc PW306D1
- Engine time: 3,984 hours, 2,675 cycles
- System (JASC): [8300 · Accessory Gearboxes](https://openairdocs.org/jasc/8300)
- Part: Cover
- Part number: 30B720901
- Condition: Corroded
- Location: Lt Accessory G/B
- 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/2021F00116

## Discrepancy

LH ENGINE AGB AFT COVER MOUNTING PAD CORROSION. ACCOMPLISHED PRATT & WHITNEY DAA2021-390-PW306D1-CN0111 DATED MAY 11, 2021; DEVIATION LETTER - ENGINE MODEL PW306D1 SERIAL NUMBER CN0111 (TTSN 3983.5 HOURS CYCLES: 2675) - ACCESSORY GEAR BOX TOUCH UP REPAIR.

---
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.