B757-200 crew made an emergency descent after loss of cabin pressurization in muha international air...

Attributes
ACN	620724
Time
Date	200406
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	intersection : ursus
State Reference	FO
Altitude	msl single value : 35000
Environment
Flight Conditions	VMC
Aircraft 1
Controlling Facilities	artcc : muha.artcc
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	620724
Person 2
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : commercial
ASRS Report	620562
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	aircraft equipment other aircraft equipment : cabin alt warning horn other flight crewa other flight crewb
Resolutory Action	flight crew : declared emergency flight crew : landed in emergency condition other
Consequence	other other
Supplementary
Problem Areas	Company Aircraft
Primary Problem	Aircraft

Narrative:

Pressurization. Flight was dispatched to mia with the l-hand pack inoperative. Flight limited to maximum altitude of FL350. At FL350 approaching ursus intersection northbound, cabin altitude warning light illuminated with associated aural warning. Executed red box procedures for loss of cabin altitude, including deploying passenger oxygen. Declared an emergency with havana center and started emergency descent. Shortly after initiating descent, cabin altitude exceeded 10000 ft. Contacted ZMA for continued descent and direct routing to miami (destination). Descended to below 10000 ft immediately. Completed appropriate checklists and landed at destination with emergency vehicles standing by.

Original NASA ASRS Text

Title: B757-200 CREW MADE AN EMER DSCNT AFTER LOSS OF CABIN PRESSURIZATION IN MUHA INTL AIRSPACE.

Narrative: PRESSURIZATION. FLT WAS DISPATCHED TO MIA WITH THE L-HAND PACK INOP. FLT LIMITED TO MAX ALT OF FL350. AT FL350 APCHING URSUS INTXN NBOUND, CABIN ALT WARNING LIGHT ILLUMINATED WITH ASSOCIATED AURAL WARNING. EXECUTED RED BOX PROCS FOR LOSS OF CABIN ALT, INCLUDING DEPLOYING PAX OXYGEN. DECLARED AN EMER WITH HAVANA CTR AND STARTED EMER DSCNT. SHORTLY AFTER INITIATING DSCNT, CABIN ALT EXCEEDED 10000 FT. CONTACTED ZMA FOR CONTINUED DSCNT AND DIRECT ROUTING TO MIAMI (DEST). DSNDED TO BELOW 10000 FT IMMEDIATELY. COMPLETED APPROPRIATE CHKLISTS AND LANDED AT DEST WITH EMER VEHICLES STANDING BY.

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.

B757-200 crew made an emergency descent after loss of cabin pressurization in muha international airspace.