A fokker 100 at FL240 experienced loss of the entire outer pane on the captain's sliding window.

Attributes
ACN	431117
Time
Date	199903
Day	Sat
Local Time Of Day	0601 To 1200
Place
Locale Reference	navaid : hmv.vortac
State Reference	TN
Altitude	msl single value : 24000
Environment
Flight Conditions	Mixed
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl.artcc
Operator	common carrier : air carrier
Make Model Name	Fokker 100
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : enroute altitude change
Route In Use	enroute airway : j83.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 180 flight time total : 14500
ASRS Report	431117
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time total : 10800
ASRS Report	430852
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Resolutory Action	none taken : insufficient time
Consequence	other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

Descended to FL240. Received descent clearance to cross shine intersection on clt arrival. Captain's sliding window popped and appeared delaminated. It appeared that the outer layer had separated from aircraft. Consulted QRH. Landed without incident. After landing, confirmed that the outer layer did separate from window. Callback conversation with reporter revealed the following information: the reporter stated that when on the ground, maintenance inspected the window and discovered the entire outer pane was missing. The reporter said the window had no obvious defects on the preflight check and nothing to indicate delamination or disbonding of the panes. The reporter states the window heat was on and functioning normally. The reporter said the aircraft and engines were checked for damage or ingestion and none found.

Original NASA ASRS Text

Title: A FOKKER 100 AT FL240 EXPERIENCED LOSS OF THE ENTIRE OUTER PANE ON THE CAPT'S SLIDING WINDOW.

Narrative: DSNDED TO FL240. RECEIVED DSCNT CLRNC TO CROSS SHINE INTXN ON CLT ARR. CAPT'S SLIDING WINDOW POPPED AND APPEARED DELAMINATED. IT APPEARED THAT THE OUTER LAYER HAD SEPARATED FROM ACFT. CONSULTED QRH. LANDED WITHOUT INCIDENT. AFTER LNDG, CONFIRMED THAT THE OUTER LAYER DID SEPARATE FROM WINDOW. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT WHEN ON THE GND, MAINT INSPECTED THE WINDOW AND DISCOVERED THE ENTIRE OUTER PANE WAS MISSING. THE RPTR SAID THE WINDOW HAD NO OBVIOUS DEFECTS ON THE PREFLT CHK AND NOTHING TO INDICATE DELAMINATION OR DISBONDING OF THE PANES. THE RPTR STATES THE WINDOW HEAT WAS ON AND FUNCTIONING NORMALLY. THE RPTR SAID THE ACFT AND ENGS WERE CHKED FOR DAMAGE OR INGESTION AND NONE FOUND.

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.