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A CL60 in climb to 4000 ft diverted due to right engine reverser unlock warning accompanied by buffeting and vibration.
| Attributes | |
| ACN | 630817 |
| Time | |
| Date | 200409 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl bound lower : 600 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | general aviation : corporate |
| Make Model Name | Challenger CL600 |
| Operating Under FAR Part | Part 91 |
| Flight Phase | climbout : initial climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : corporate |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : cfi pilot : commercial pilot : flight engineer pilot : multi engine |
| Experience | flight time last 90 days : 150 flight time total : 13000 flight time type : 3000 |
| ASRS Report | 630817 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 8000 flight time type : 1500 |
| ASRS Report | 630992 |
| Events | |
| Anomaly | aircraft equipment problem : critical |
| Independent Detector | aircraft equipment other aircraft equipment : r/h reverser position lights other flight crewa other flight crewb |
| Resolutory Action | controller : provided flight assist flight crew : diverted to another airport |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : repair performance deficiency : fault isolation |
| Supplementary | |
| Problem Areas | Company Flight Crew Human Performance Maintenance Human Performance Environmental Factor Aircraft |
| Primary Problem | Maintenance Human Performance |
Narrative:
Entering final segment, in left turn to departure heading, right T/right 'reverser unlock' annunciated. Executed 'reverser deploy in flight' checklist. In VMC, advised ZZZ tower of situation and leveled at 2000 ft (cleared to 4000 ft). Tower advised 'maintain VFR' handoff to ZZZ departure for vectors to visual approach to ZZZ1. Uneventful landing, no special handling was requested, notified company. Callback conversation with reporter revealed the following information: the reporter stated the reverser sleeve must have moved slightly aft as the buffeting and vibrations were strongly felt throughout the aircraft. The reporter stated activating the emergency stow stopped the buffeting and vibrations and put out the unlock warning light. The reporter stated the reverser did not fully deploy as the green reverser deploy light never illuminated, but it certainly did unlatch. The reporter said the airplane landed with both reversers inoperative and needed heavy braking. After parking, the #4 main tire fuse plug failed from overheating and caused the tire to go flat. The reporter said the airplane was taken to a maintenance facility for heavy maintenance and reverser repair and remained there for almost 4 weeks. The reporter stated the following maintenance and corrective action was accomplished on the right thrust reverser. The right thrust reverser harness was replaced per the maintenance manual. Readjusted main track slider blocks per maintenance manual. Readjusted pneumatic drive maintenance manual. Readjusted ball screw actuators per maintenance manual. Rigged thrust reverser as per maintenance manual. Operational check and flight test ok. Deferred item MEL cleared.
Original NASA ASRS Text
Title: A CL60 IN CLB TO 4000 FT DIVERTED DUE TO RIGHT ENG REVERSER UNLOCK WARNING ACCOMPANIED BY BUFFETING AND VIBRATION.
Narrative: ENTERING FINAL SEGMENT, IN LEFT TURN TO DEP HDG, R T/R 'REVERSER UNLOCK' ANNUNCIATED. EXECUTED 'REVERSER DEPLOY IN FLT' CHKLIST. IN VMC, ADVISED ZZZ TWR OF SIT AND LEVELED AT 2000 FT (CLRED TO 4000 FT). TWR ADVISED 'MAINTAIN VFR' HANDOFF TO ZZZ DEP FOR VECTORS TO VISUAL APCH TO ZZZ1. UNEVENTFUL LNDG, NO SPECIAL HANDLING WAS REQUESTED, NOTIFIED COMPANY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE REVERSER SLEEVE MUST HAVE MOVED SLIGHTLY AFT AS THE BUFFETING AND VIBRATIONS WERE STRONGLY FELT THROUGHOUT THE ACFT. THE RPTR STATED ACTIVATING THE EMER STOW STOPPED THE BUFFETING AND VIBRATIONS AND PUT OUT THE UNLOCK WARNING LIGHT. THE RPTR STATED THE REVERSER DID NOT FULLY DEPLOY AS THE GREEN REVERSER DEPLOY LIGHT NEVER ILLUMINATED, BUT IT CERTAINLY DID UNLATCH. THE RPTR SAID THE AIRPLANE LANDED WITH BOTH REVERSERS INOP AND NEEDED HEAVY BRAKING. AFTER PARKING, THE #4 MAIN TIRE FUSE PLUG FAILED FROM OVERHEATING AND CAUSED THE TIRE TO GO FLAT. THE RPTR SAID THE AIRPLANE WAS TAKEN TO A MAINT FACILITY FOR HEAVY MAINT AND REVERSER REPAIR AND REMAINED THERE FOR ALMOST 4 WEEKS. THE RPTR STATED THE FOLLOWING MAINT AND CORRECTIVE ACTION WAS ACCOMPLISHED ON THE RIGHT THRUST REVERSER. THE RIGHT THRUST REVERSER HARNESS WAS REPLACED PER THE MAINT MANUAL. READJUSTED MAIN TRACK SLIDER BLOCKS PER MAINT MANUAL. READJUSTED PNEUMATIC DRIVE MAINT MANUAL. READJUSTED BALL SCREW ACTUATORS PER MAINT MANUAL. RIGGED THRUST REVERSER AS PER MAINT MANUAL. OPERATIONAL CHECK AND FLT TEST OK. DEFERRED ITEM MEL CLEARED.
Data retrieved from NASA's ASRS site as of July 2007 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.