Captain of unidentified aircraft type reports a gradual increase in cabin altitude during descent that is arrested by going to the manual pressurization mode.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	802538
Time
Date	200809
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : zzz.vor
State Reference	US
Altitude	msl single value : 19000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zzz.artcc
Operator	common carrier : air carrier
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 121
Flight Phase	descent : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4000 flight time type : 1500
ASRS Report	802538
Events
Anomaly	aircraft equipment problem : critical non adherence : clearance
Independent Detector	aircraft equipment other aircraft equipment : cabin alt warning other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Supplementary
Problem Areas	Aircraft
Primary Problem	Aircraft

Narrative:

On a descent from FL240 to 16000 ft; we got a cabin pressure master warning. I declared an emergency and ATC gave us 13500 ft for an altitude. The cabin pressure got to 12000 ft. It went below 10000 ft in a hurry because we got down in a hurry. The passenger never knew anything was wrong. From the time I got the light to after I ran the checklist; I never grabbed my mask because the cabin was pressurizing in manual mode. It wasn't a rapid depressurization.

Original NASA ASRS Text

Title: CAPTAIN OF UNIDENTIFIED ACFT TYPE REPORTS A GRADUAL INCREASE IN CABIN ALT DURING DESCENT THAT IS ARRESTED BY GOING TO THE MANUAL PRESSURIZATION MODE.

Narrative: ON A DSCNT FROM FL240 TO 16000 FT; WE GOT A CABIN PRESSURE MASTER WARNING. I DECLARED AN EMER AND ATC GAVE US 13500 FT FOR AN ALT. THE CABIN PRESSURE GOT TO 12000 FT. IT WENT BELOW 10000 FT IN A HURRY BECAUSE WE GOT DOWN IN A HURRY. THE PAX NEVER KNEW ANYTHING WAS WRONG. FROM THE TIME I GOT THE LIGHT TO AFTER I RAN THE CHKLIST; I NEVER GRABBED MY MASK BECAUSE THE CABIN WAS PRESSURIZING IN MANUAL MODE. IT WASN'T A RAPID DEPRESSURIZATION.

Data retrieved from NASA's ASRS site as of May 2009 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.