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A captain and first officer report about the need for clearer wording of MEL 74-1 when deferring engine ignition systems channel-a or-B on crj-700 aircraft. They had performed a flight crew placard under the direction of maintenance control and departed with channel-a ignition inoperative on both engines.
| Attributes | |
| ACN | 1021210 |
| Time | |
| Date | 201207 |
| Local Time Of Day | 0001-0600 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Make Model Name | Regional Jet 700 ER/LR (CRJ700) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Ignition System |
| Person 1 | |
| Function | Captain Pilot Flying |
| Qualification | Flight Crew Air Transport Pilot (ATP) |
| Person 2 | |
| Function | First Officer Pilot Flying |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural MEL |
Narrative:
A captain came to me and said the MEL 74-1 was done in error. The MEL procedure says two available one required. I took that to mean one channel had to be operating per engine. Channel-B was operating on both engines. [EICAS message] ign a fault left and ign a fault right. I made sure maintenance control knew when I was flight crew placarding the ignition-a (ign a) for both left and right engines and he said that this was the right MEL. The MEL procedure is confusing because it does not specify that you cannot MEL channel-a on both engines. I complied with the provisions of the MEL. The MEL procedure needs to specifically say that you cannot MEL both ign a on both engines.
Original NASA ASRS Text
Title: A Captain and First Officer report about the need for clearer wording of MEL 74-1 when deferring Engine Ignition Systems Channel-A or-B on CRJ-700 aircraft. They had performed a Flight Crew Placard under the direction of Maintenance Control and departed with Channel-A Ignition inoperative on both engines.
Narrative: A Captain came to me and said the MEL 74-1 was done in error. The MEL procedure says two available one required. I took that to mean one Channel had to be operating per engine. Channel-B was operating on both engines. [EICAS message] IGN A Fault L and IGN A Fault R. I made sure Maintenance Control knew when I was Flight Crew Placarding the Ignition-A (IGN A) for BOTH left and right engines and he said that this was the right MEL. The MEL procedure is confusing because it does not specify that you cannot MEL Channel-A on both engines. I complied with the provisions of the MEL. The MEL procedure needs to specifically say that you cannot MEL both IGN A on both engines.
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.