<< >> NASA ASRS Report 394688, February 1998

An A300 loses both packs and all pressurization capability. An emergency descent is initiated and the aircraft returns to sju. Packs would not reset.

Attributes
ACN	394688
Time
Date	199802
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : sju
State Reference	PR
Altitude	msl bound lower : 25000 msl bound upper : 28000
Environment
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : tjzs
Operator	common carrier : air carrier
Make Model Name	A300
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : intermediate altitude other other
Route In Use	enroute : atlantic enroute : other oceanic
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
ASRS Report	394688
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	394687
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	Pilot Deviation other

Narrative:

I was flying the aircraft. Climbing out of FL250, the #2 pack appeared to fail. Reset was unsuccessful. Cabin continued to climb at 700 FPM. Climb was stopped at FL280. #1 pack appeared to fail just after leveloff. Reset of the #1 pack was also unsuccessful. The captain initiated an emergency descent and returned to sju.

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Original NASA ASRS Text

Title: AN A300 LOSES BOTH PACKS AND ALL PRESSURIZATION CAPABILITY. AN EMER DSCNT IS INITIATED AND THE ACFT RETURNS TO SJU. PACKS WOULD NOT RESET.

Narrative: I WAS FLYING THE ACFT. CLBING OUT OF FL250, THE #2 PACK APPEARED TO FAIL. RESET WAS UNSUCCESSFUL. CABIN CONTINUED TO CLB AT 700 FPM. CLB WAS STOPPED AT FL280. #1 PACK APPEARED TO FAIL JUST AFTER LEVELOFF. RESET OF THE #1 PACK WAS ALSO UNSUCCESSFUL. THE CAPT INITIATED AN EMER DSCNT AND RETURNED TO SJU.

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.