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A falcon 20 on approach experienced a loud explosive type noise. Flying characteristics ok, engine's operation ok. Found right engine lower cowling departed aircraft.
| Attributes | |
| ACN | 595446 |
| Time | |
| Date | 200309 |
| Day | Tue |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : zzz.tracon |
| State Reference | US |
| Altitude | msl single value : 16500 |
| Environment | |
| Flight Conditions | VMC |
| Light | Night |
| Aircraft 1 | |
| Controlling Facilities | tracon : zzz.tracon |
| Operator | common carrier : air taxi |
| Make Model Name | Light Transport, Low Wing, 2 Turbojet Eng |
| Operating Under FAR Part | Part 135 |
| Flight Phase | descent : approach |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air taxi |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 250 flight time total : 3550 flight time type : 1000 |
| ASRS Report | 595446 |
| Person 2 | |
| Affiliation | company : air taxi |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 100 flight time total : 1800 flight time type : 6 |
| ASRS Report | 595444 |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft Maintenance Human Performance |
| Primary Problem | Ambiguous |
Narrative:
Falcon 20 departed ZZZ1 towards ZZZ. Climb and en route were uneventful, but while preparing for approach at destination, a loud explosive-type noise was heard. There were no changes in flying characteristics nor any sign of damage/changes in engine parameters. Postflt examination revealed right engine cowling was missing. PIC made the appropriate report to company. Callback conversation with reporter revealed the following information: the reporter stated the cause of the right engine lower cowling departing the aircraft is unknown as the cowling has not been recovered. The reporter said the preflight walk around inspection was normal, and the engine cowling appeared closed and locked.
Original NASA ASRS Text
Title: A FALCON 20 ON APCH EXPERIENCED A LOUD EXPLOSIVE TYPE NOISE. FLYING CHARACTERISTICS OK, ENG'S OP OK. FOUND R ENG LOWER COWLING DEPARTED ACFT.
Narrative: FALCON 20 DEPARTED ZZZ1 TOWARDS ZZZ. CLB AND ENRTE WERE UNEVENTFUL, BUT WHILE PREPARING FOR APCH AT DEST, A LOUD EXPLOSIVE-TYPE NOISE WAS HEARD. THERE WERE NO CHANGES IN FLYING CHARACTERISTICS NOR ANY SIGN OF DAMAGE/CHANGES IN ENG PARAMETERS. POSTFLT EXAMINATION REVEALED R ENG COWLING WAS MISSING. PIC MADE THE APPROPRIATE RPT TO COMPANY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE R ENG LOWER COWLING DEPARTING THE ACFT IS UNKNOWN AS THE COWLING HAS NOT BEEN RECOVERED. THE RPTR SAID THE PREFLT WALK AROUND INSPECTION WAS NORMAL, AND THE ENG COWLING APPEARED CLOSED AND LOCKED.
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.