# SDR 2026FA0000660

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 20, 2026
- Submitted: August 20, 2026
- Operation: General aviation
- Aircraft: [N60WU](https://openairdocs.org/aircraft/N60WU), registered now
- Make and model: Piper PA-44-180
- Registry model: [Piper PA-44-180](https://openairdocs.org/model/piper-pa-44-180) (OpenAirDocs)
- Aircraft serial: 4496615
- Aircraft time: 177 hours
- Engine: Lyc AEIO360B1G6
- Engine time: 177 hours
- System (JASC): [7120 · Engine Mount Section](https://openairdocs.org/jasc/7120)
- Part: Nut
- Part number: MS210456
- Condition: Sheared
- Location: Engine Mount
- Part time: 177 hours
- 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/2026FA0000660

## Discrepancy

DURING THE AIRCRAFT'S FIRST 100 HOUR INSPECTION, THERE IS TASK TO RETORQUE THE ENGINE MOUNT-TO-FIREWALL BOLTS AS SPECIFIED IN MAINTENANCE MANUAL 71-00-00, FIGURE 1. DURING TORQUE CHECK, FOUND MULTIPLE NUTS UNDER-TORQUED AND ONE NUT THAT FAILED, SHEARING INTO MULTIPLE PIECES. ENGINE MOUNT-TO-FIREWALL NUT P/N MS21045-6 SHOULD BE TORQUED TO 240-270 IN. LBS. THE LH ENGINE I/B LWR NUT SHEARED BEFORE 270 IN. LBS. PICTURES ARE AVAILABLE UPON REQUEST.

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