# SDR MEX2002053

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 26, 2002
- Submitted: April 18, 2002
- Operation: Air carrier
- Aircraft: N803ML
- Make and model: Doug DC-9-87
- Registry model: [Doug DC-9-87](https://openairdocs.org/model/mcdonnell-douglas-dc-9-87) (OpenAirDocs)
- Aircraft serial: 49726
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Controller
- Part number: 4034241973
- Condition: Failed
- Location: E/E Compt
- Part time: 6,102 hours, 3,595 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: G
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/MEX2002053

## Discrepancy

FLT 584 - CUN-MEX - DURING FLIGHT THERE WAS 25 DEGREE DIFFERENCE IN HDG RDI OF PILOT AND ALSO ATS 1, AUTO PILOT AND FMA O;S,  BOTH DFGC CONFIRMED FAIL IN ATT 1 AND 2, HDG 1 AND 2 AND COMPASS CONTROLLER 1 AND 2.  THERE WAS AN INFORMATION LOST IN DFGC 2.  BOTH C/B OF AHRS WERE RESET, AND AIRCRAFT WAS DISPATCHED.  DURING FLIGHT, CREW REPORTED THE FAIL AGAIN.  AT RON MEX 26/27 THE AHRU 1, DFGC 2 AND COMPASS CONTROLLER 2 WERE REPLACED IAW 34-21-10, 22-01-01 AND 34-21-13.  AN RTS WAS PERFORMED, COMPUTERS OK IAW MM 22-01-05.  (M)

---
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.