# SDR ASMF200508009

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 18, 2005
- Submitted: August 20, 2005
- Operation: Air carrier
- Aircraft: [N216AM](https://openairdocs.org/aircraft/N216AM), registered now
- 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: 49586
- Aircraft time: 37,133 hours, 29,795 cycles
- Engine: Pwa JT8D219
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Symbol Generator
- Part number: 4055900905
- Part serial: 88060556
- Condition: Inoperative
- Part time: 25,911 hours, 19,665 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASMF200508009

## Discrepancy

AIRCRAFT RETURNED OF FLIGHT, DURING ROTATION HEARD A LOUD NOISE IN THE NOSE LANDING GEAR, LOOSING AHRS 2 WITH HEADING, HORIZON LIGHTS TURNED ON, FMA AND RIGHT ND WITHOUT INFORMATION. AHRS 2 AND 3 WERE SWAPPED IAW MM 34-21-10 AND VISUAL INSPECTION OF NLG WAS PERFORMED WITHOUT DAMAGE DETECTED IAW MM 32-20-00. SYMBOL GENERATOR AND AHRU 2 WERE REPLACED IAW MM 34-21-10, TESTED CORRECT.

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