# SDR 2001FA0000542

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 26, 2001
- Submitted: October 26, 2001
- Operation: General aviation
- Aircraft: [N959SD](https://openairdocs.org/aircraft/N959SD), registered now
- Make and model: Doug 600N
- Registry model: [Doug 600N](https://openairdocs.org/model/mcdonnell-douglas-helicopter-600n) (OpenAirDocs)
- Aircraft serial: RN019
- Aircraft time: 1,993 hours
- System (JASC): [5302 · Rotorcraft Tail Boom](https://openairdocs.org/jasc/5302)
- Part: Fitting
- Part number: 500N3422
- Condition: Cracked
- Location: Tail Boom
- Part time: 1,993 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/2001FA0000542

## Discrepancy

AFTER THE PILOT REPORTED UNUSUAL TAILBOOM MOVEMENT DURING HIS PREFLIGHT IHSPECTION , ONE OF OUR MECHANICS REMOVE THE TAILBOOM ATTACHMENT FAIRING. HE FOUND THE RT UPPER TAILBOOM ATTACH BOLT HAD FRACTURED , AND THE BOLT HEAD WAS HELD ONLY BY SAFETY WIRE.WE THEN REMOVED THE RIVETED CLOSURE COVERING THE NUTPLATE AND ATTACH FITTING. WE FOUND FITTING, P/N 500N3422,CRACKED AND ANGLE P/N 500N3129-6 ,ALSO CRACKED.   WE HAVE GROUNDED ALL 3 OF OUR 600N MODELS ,   AND HAVE FOUND CRACKS ON ALL 3 ANGLES .

---
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.