B737-400 crew had the wing-body overheat light illuminate in ZMA class a.

Attributes
ACN	523121
Time
Date	200108
Day	Wed
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zma.artcc
State Reference	FL
Altitude	msl single value : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma.artcc
Operator	common carrier : air carrier
Make Model Name	B737-400
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Route In Use	enroute : atlantic enroute airway : ar7.airway
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : commercial pilot : private pilot : multi engine pilot : instrument pilot : flight engineer pilot : cfi pilot : atp
Experience	flight time last 90 days : 275 flight time total : 10000 flight time type : 4000
ASRS Report	523121
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : wing-baby overheat warning other flight crewa other flight crewb
Resolutory Action	controller : issued new clearance controller : provided flight assist flight crew : declared emergency flight crew : diverted to another airport flight crew : landed in emergency condition other
Consequence	other other other
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

While flying air carrier flight from mia to phl on aug/xa/01. While flying AR7 to diw at 29000 ft MSL we got left wing-body overheat light. Went through QRH checklist and isolated system, however light did not go out. Could not maintain cabin pressure so descended to 25000 ft MSL. Could not maintain pressure so descended to 11000 ft MSL and still could not maintain cabin pressure. Declared emergency and diverted to pbi. Wing-body overheat light never extinguished. Landed in pbi at XB07 pm, normally.

Original NASA ASRS Text

Title: B737-400 CREW HAD THE WING-BODY OVERHEAT LIGHT ILLUMINATE IN ZMA CLASS A.

Narrative: WHILE FLYING ACR FLT FROM MIA TO PHL ON AUG/XA/01. WHILE FLYING AR7 TO DIW AT 29000 FT MSL WE GOT L WING-BODY OVERHEAT LIGHT. WENT THROUGH QRH CHKLIST AND ISOLATED SYS, HOWEVER LIGHT DID NOT GO OUT. COULD NOT MAINTAIN CABIN PRESSURE SO DSNDED TO 25000 FT MSL. COULD NOT MAINTAIN PRESSURE SO DSNDED TO 11000 FT MSL AND STILL COULD NOT MAINTAIN CABIN PRESSURE. DECLARED EMER AND DIVERTED TO PBI. WING-BODY OVERHEAT LIGHT NEVER EXTINGUISHED. LANDED IN PBI AT XB07 PM, NORMALLY.

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.