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A line avionics technician reports he was unable to find the correct dc voltage values in their troubleshooting guidelines that matched the newer 60-0-60 angle of attack (aoa) vanes used in their md-80 aircraft. He noticed the lack of specifications in amm 27-81-00 while troubleshooting a repeated auto-slat fault.
| Attributes | |
| ACN | 1009985 |
| Time | |
| Date | 201205 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | MD-82 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Stall Protection System |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Powerplant Maintenance Airframe Maintenance Avionics |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Deviation - Procedural FAR |
Narrative:
Mr. Y and I were assigned on overnight to work an out of service md-82 aircraft; aircraft X; which had items for auto-slat fail; with history. The maintenance open/deferred items (modi) report listed it as a mandatory requirement procedure item; with a corrective action in the modi. Per following corrective action; while attempting to troubleshoot fault; found that; the aircraft maintenance manual (amm) reference in the corrective action we were to follow; was md-82; amm 27-81-00-1. While troubleshooting aircraft; found that aircraft X does not have an angle of attack (aoa) vane installed that matches the troubleshooting guide; which only list two aoa vane styles; one with a center scribe line and three scribe lines above and below it; the other aoa vane style is a rosemount aoa sensor vane that goes from 30-0-30. The one now on aircraft X is an aoa style that goes from 60-0-60; which the troubleshooting guide does not cover. So we are unable to find the correct voltage dc values that the 60-0-60 aoa vanes should be; at each degree settings. Routine overnight maintenance.
Original NASA ASRS Text
Title: A Line Avionics Technician reports he was unable to find the correct DC Voltage values in their Troubleshooting Guidelines that matched the newer 60-0-60 Angle of Attack (AOA) vanes used in their MD-80 aircraft. He noticed the lack of specifications in AMM 27-81-00 while troubleshooting a repeated Auto-Slat fault.
Narrative: Mr. Y and I were assigned on overnight to work an Out of Service MD-82 aircraft; Aircraft X; which had items for Auto-Slat fail; with history. The Maintenance Open/Deferred Items (MODI) report listed it as a Mandatory Requirement Procedure item; with a Corrective Action in the MODI. Per following Corrective Action; while attempting to troubleshoot fault; found that; the Aircraft Maintenance Manual (AMM) reference in the Corrective Action we were to follow; was MD-82; AMM 27-81-00-1. While troubleshooting aircraft; found that Aircraft X does not have an Angle of Attack (AOA) vane installed that matches the Troubleshooting Guide; which only list two AOA vane styles; one with a center scribe line and three scribe lines above and below it; the other AOA vane style is a Rosemount AOA sensor vane that goes from 30-0-30. The one now on Aircraft X is an AOA style that goes from 60-0-60; which the Troubleshooting Guide does not cover. So we are unable to find the correct Voltage DC values that the 60-0-60 AOA vanes should be; at each degree settings. Routine Overnight Maintenance.
Data retrieved from NASA's ASRS site as of July 2013 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.