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A lear 25 on rotation crew heard a loud abnormal rumble. Diverted and on landing found right engine upper cowling had departed aircraft.
| Attributes | |
| ACN | 591379 |
| Time | |
| Date | 200308 |
| Day | Sun |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 50 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tower : zzz.tower |
| Operator | common carrier : air taxi |
| Make Model Name | Learjet 25 |
| Operating Under FAR Part | Part 135 |
| Flight Phase | climbout : takeoff |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : instrument pilot : multi engine pilot : commercial pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 90 flight time total : 4200 flight time type : 1293 |
| ASRS Report | 591379 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : atp pilot : multi engine |
| Experience | flight time last 90 days : 150 flight time total : 4000 flight time type : 700 |
| ASRS Report | 591450 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | flight crew : diverted to another airport |
| Consequence | other other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Company Aircraft |
| Primary Problem | Aircraft |
Narrative:
We departed ZZZ around XA45. We were departing IFR in VMC conditions. Immediately on lifting off on the takeoff roll a loud rumbling noise was heard. We asked to come around for landing. In the short time we were on downwind, I tried to isolate the noise. I could not do this, so I landed the aircraft. On the landing roll I saw the right nose cowling door. We notified the tower that something was on the runway. After departing the runway, I confirmed that the cowling was missing. We told the tower and taxied back to parking. Callback: the reporter stated the cowling was visually checked by the first officer, and myself, the captain. The reporter said the latches appeared latched and faired. The reporter stated examination of the recovered cowling indicated the front 2 latches were not latched or were false latched with no visible indication of being unlocked. The reporter said it is not uncommon on the lear to land and find 1 or 2 latches unlocked and sticking out.
Original NASA ASRS Text
Title: A LEAR 25 ON ROTATION CREW HEARD A LOUD ABNORMAL RUMBLE. DIVERTED AND ON LNDG FOUND R ENG UPPER COWLING HAD DEPARTED ACFT.
Narrative: WE DEPARTED ZZZ AROUND XA45. WE WERE DEPARTING IFR IN VMC CONDITIONS. IMMEDIATELY ON LIFTING OFF ON THE TKOF ROLL A LOUD RUMBLING NOISE WAS HEARD. WE ASKED TO COME AROUND FOR LNDG. IN THE SHORT TIME WE WERE ON DOWNWIND, I TRIED TO ISOLATE THE NOISE. I COULD NOT DO THIS, SO I LANDED THE ACFT. ON THE LNDG ROLL I SAW THE R NOSE COWLING DOOR. WE NOTIFIED THE TWR THAT SOMETHING WAS ON THE RWY. AFTER DEPARTING THE RWY, I CONFIRMED THAT THE COWLING WAS MISSING. WE TOLD THE TWR AND TAXIED BACK TO PARKING. CALLBACK: THE RPTR STATED THE COWLING WAS VISUALLY CHKED BY THE FO, AND MYSELF, THE CAPT. THE RPTR SAID THE LATCHES APPEARED LATCHED AND FAIRED. THE RPTR STATED EXAMINATION OF THE RECOVERED COWLING INDICATED THE FRONT 2 LATCHES WERE NOT LATCHED OR WERE FALSE LATCHED WITH NO VISIBLE INDICATION OF BEING UNLOCKED. THE RPTR SAID IT IS NOT UNCOMMON ON THE LEAR TO LAND AND FIND 1 OR 2 LATCHES UNLOCKED AND STICKING OUT.
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.