# SDR VNAA2012112400018

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 24, 2012
- Submitted: November 29, 2012
- Operation: Air carrier
- Aircraft: [N718PS](https://openairdocs.org/aircraft/N718PS), registered now
- Make and model: Cndair CL6002C10
- Aircraft serial: 10175
- Aircraft time: 19,485 hours, 19,492 cycles
- System (JASC): [3425 · Integrated Flight System](https://openairdocs.org/jasc/3425)
- Part: Computer
- Part number: 6229336400
- Part serial: 1BVPB
- Condition: Malfunctioned
- Location: Ahrs
- Stage of operation: CR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/VNAA2012112400018

## Discrepancy

CREW REPORTED UNCOMMANDED PITCH ON AUTOPILOT WITH EFIS COMP MON PIT AND ROL. ED1 WENT BLANK AND LOST AIRSPEED, PITCH AND ALTITUDE.  F/O SIDE ED WAS INTERMITTENT. AIRCRAFT YAWED INTERMITTENTLY.  CREW DECLARED AN EMERGENCY AND LANDED WITHOUT INCIDENT.  MAINTENANCE TROUBLESHOT, REMOVED AND REPLACED AHRS 1 (ATTITUDE AND HEADING REFERENCE SYSTEM COMPUTER) AND PERFORMED CHECKS USING AIRCRAFT MAINTENANCE MANUALS.  AIRCRAFT RELEASED FOR SERVICE.

---
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.