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A maintenance controller in training reports that a company crj-200 aircraft was not able to pressurize after a contract maintenance provider had de-activated the avionics cooling inboard shut-off valve to the 'closed' position and the overboard exhaust sov to the 'open' position. Procedure was opposite from what the MEL required. Aircraft diverted.
| Attributes | |
| ACN | 1127490 |
| Time | |
| Date | 201311 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.Airport |
| State Reference | US |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | Regional Jet 200 ER/LR (CRJ200) |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Parked |
| Component | |
| Aircraft Component | Air Conditioning and Pressurization Pack |
| Person 1 | |
| Function | Other / Unknown |
| Qualification | Maintenance Airframe Maintenance Powerplant |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical Deviation - Procedural Published Material / Policy Inflight Event / Encounter Other / Unknown |
Narrative:
I had on-call maintenance in ZZZ1 deactivate the [overboard] ob shut-off valves (sovs) and (inboard) inbd sovs to comply with an [MEL] 'M' action [procedure] for MEL 21-24-05 and MEL 21-24-06-xx. I printed off the amm references and faxed these to the on-call maintenance [provider]. Later my trainer asked me if I had sent the [our] air carrier's supplemental to the on-call maintenance? I told him I had not and I assumed the on-call maintenance provider had all the documentation he needed. On-call maintenance performed the 'M' action and incorrectly deactivated the sovs. With the [overboard] ob sov open the crj-200 aircraft was not able to pressurize and had to divert. [Recommend to] always reference the internal documents. Documentation missing.
Original NASA ASRS Text
Title: A Maintenance Controller in training reports that a company CRJ-200 aircraft was not able to pressurize after a Contract Maintenance provider had de-activated the Avionics cooling Inboard Shut-Off Valve to the 'Closed' position and the Overboard Exhaust SOV to the 'Open' position. Procedure was opposite from what the MEL required. Aircraft diverted.
Narrative: I had on-call Maintenance in ZZZ1 deactivate the [Overboard] OB Shut-off Valves (SOVs) and (Inboard) INBD SOVs to comply with an [MEL] 'M' action [procedure] for MEL 21-24-05 and MEL 21-24-06-XX. I printed off the AMM references and faxed these to the on-call Maintenance [Provider]. Later my Trainer asked me if I had sent the [our] Air Carrier's Supplemental to the on-call Maintenance? I told him I had not and I assumed the on-call Maintenance provider had all the documentation he needed. On-call Maintenance performed the 'M' action and incorrectly deactivated the SOVs. With the [Overboard] OB SOV open the CRJ-200 aircraft was not able to pressurize and had to divert. [Recommend to] always reference the internal documents. Documentation missing.
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.