# SDR DHL2001803005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 9, 2001
- Submitted: May 11, 2001
- Operation: Air carrier
- Aircraft: [N803DH](https://openairdocs.org/aircraft/N803DH), registered now
- Make and model: Doug DC-8-73F
- Registry model: [Doug DC-8-73F](https://openairdocs.org/model/douglas-dc-8-73f) (OpenAirDocs)
- Aircraft serial: 46123
- System (JASC): [3421 · Attitude Gyro and Indicating System](https://openairdocs.org/jasc/3421)
- Part: Indicator
- Condition: Faulty
- Location: Cockpit
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/DHL2001803005

## Discrepancy

AUTOPILOT WHEN IN HEADING SELECT MODE DIVERGES IN ROLL. FOUND ON STEP 7A & 7B AT ROLL COMPUTER BITE CHECK, MM 22-12-0 PG 101-107, FAILED FULL SCALE RIGHT STOP WHEN SELECTING CAPT''S NAVIGATION INFO VIA NAV SELECT BUTTON. AUTOPILOT CONTROL PANEL ROLL COMPUTER BITE TEST OK WHEN USING F/O NAVIGATION INFO.  PROBLEM FOLLOWED WHEN SWAPPED CAPT & F/O PDI.  REINSTALLED CAPT & F/O PDI TO ORIGINAL POSITIONS.  NEED NEW CAPT PDI IND.   PLACARD INSTALLED. R&R CAPT PDI.  PDI TESTS GOOD PER MM 34-21-0 & AUTOPILOT CKS GOOD PER MM22-10-0.

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