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B717 maintenance technician reported conflicting procedures resulted in autoland test not being performed prior to aircraft departure.
| Attributes | |
| ACN | 1586541 |
| Time | |
| Date | 201810 |
| Local Time Of Day | 1801-2400 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Aircraft 1 | |
| Make Model Name | B717 (Formerly MD-95) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | INS / IRS / IRU |
| Person 1 | |
| Function | Technician |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Experience | Maintenance Technician 31 |
| Events | |
| Anomaly | Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy |
Narrative:
The #2 IRU [inertial reference unit] would not align so we replaced the adiru [air data inertial reference unit] and adiru battery. Which fixed the problem. Referenced the maintenance manual procedure after we replaced the parts. Closed the circuit breaker. The paperwork tell you to perform ops test the IRU and ops test of air data system. The next steps are to close up the area. It does not tell me to do the auto land test. I found out that I was supposed to do this the next day when we had an IRU problem on [another aircraft]. I questioned why we had to do it on [the other aircraft model] but not a 717. According to the maintenance manual. I should have done the auto land test on the 717. The B717 maintenance manual never told me perform the test. If the test is required; it should be part of the B717 procedure when I remove and replaced the adiru; or at least have a reference to go to the manual for more tests procedures. If I did not encounter the [other aircraft model] issue the next day I would not have known about the B717 issue. If the auto land test is required it should be part of the B717 maintenance manual procedure.
Original NASA ASRS Text
Title: B717 Maintenance Technician reported conflicting procedures resulted in autoland test not being performed prior to aircraft departure.
Narrative: The #2 IRU [Inertial Reference Unit] would not align so we replaced the ADIRU [Air Data Inertial Reference Unit] and ADIRU battery. Which fixed the problem. Referenced the maintenance manual procedure after we replaced the parts. Closed the Circuit Breaker. The paperwork tell you to perform ops test the IRU and ops test of air data system. The next steps are to close up the area. It does not tell me to do the auto land test. I found out that I was supposed to do this the next day when we had an IRU problem on [another aircraft]. I questioned why we had to do it on [the other aircraft model] but not a 717. According to the Maintenance Manual. I should have done The Auto Land test on the 717. The B717 maintenance manual never told me perform the test. If the test is required; it should be part of the B717 procedure when I remove and replaced the ADIRU; or at least have a reference to go to the manual for more tests procedures. If I did not encounter the [other aircraft model] issue the next day I would not have known about the B717 issue. If the Auto Land Test is required it should be part of the B717 maintenance manual procedure.
Data retrieved from NASA's ASRS site 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.