Small transport jet type aircraft lost part of cowling on descent into jax.

Attributes
ACN	177840
Time
Date	199105
Day	Thu
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : crg airport : jax
State Reference	GA
Altitude	msl bound lower : 11000 msl bound upper : 14000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zjx
Operator	common carrier : air taxi
Make Model Name	Small Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air taxi
Function	flight crew : captain oversight : pic
Qualification	pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 50 flight time total : 6000 flight time type : 400
ASRS Report	177840
Person 2
Affiliation	company : air taxi
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : less severe
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

During a flight from pdk to jax, aircraft was cleared direct to the airport and directed to descend from 14000' MSL to 11000' MSL. 2 loud thumps were heard. Throttles were at idle, 250 KIAS. All engine instruments were, and remained normal. After landing it was discovered that the upper engine (right engine) cowling was missing (approximately 4 1/2' X 3'). Aircraft had extensive maintenance 7 days, 4 flts (9 legs), 14.8 hours prior including a, B, C, D phase inspection, and hot section inspection on both engines during which all engine cowls were removed and reinstalled. All, except one, leading edge cam-lock fasteners remained with the aircraft. Believe loss occurred over uninhabited wooded area southeast of waycross GA on the crg VORTAC 320 degree right 65 DME. The maintenance facility denies culpability by virtue of 14.8 flying hours. Factory notified. Preflight thoroughness is assured by virtue of copilot waxing nacelles prior to this flight (owner onboard).

Original NASA ASRS Text

Title: SMT JET TYPE ACFT LOST PART OF COWLING ON DESCENT INTO JAX.

Narrative: DURING A FLT FROM PDK TO JAX, ACFT WAS CLRED DIRECT TO THE ARPT AND DIRECTED TO DSND FROM 14000' MSL TO 11000' MSL. 2 LOUD THUMPS WERE HEARD. THROTTLES WERE AT IDLE, 250 KIAS. ALL ENG INSTS WERE, AND REMAINED NORMAL. AFTER LNDG IT WAS DISCOVERED THAT THE UPPER ENG (RIGHT ENG) COWLING WAS MISSING (APPROX 4 1/2' X 3'). ACFT HAD EXTENSIVE MAINT 7 DAYS, 4 FLTS (9 LEGS), 14.8 HRS PRIOR INCLUDING A, B, C, D PHASE INSPECTION, AND HOT SECTION INSPECTION ON BOTH ENGS DURING WHICH ALL ENG COWLS WERE REMOVED AND REINSTALLED. ALL, EXCEPT ONE, LEADING EDGE CAM-LOCK FASTENERS REMAINED WITH THE ACFT. BELIEVE LOSS OCCURRED OVER UNINHABITED WOODED AREA SE OF WAYCROSS GA ON THE CRG VORTAC 320 DEG R 65 DME. THE MAINT FAC DENIES CULPABILITY BY VIRTUE OF 14.8 FLYING HRS. FACTORY NOTIFIED. PREFLT THOROUGHNESS IS ASSURED BY VIRTUE OF COPLT WAXING NACELLES PRIOR TO THIS FLT (OWNER ONBOARD).

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.