Emergency descent clearance requested by PIC of B727 as aircraft loses cabin pressure during descent...

Attributes
ACN	338402
Time
Date	199606
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : ztl
State Reference	GA
Altitude	agl bound lower : 11000 agl bound upper : 25000
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : ztl
Operator	common carrier : air carrier
Make Model Name	B727 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	descent other other
Route In Use	arrival other arrival star : star enroute : on vectors
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 150 flight time total : 25000 flight time type : 12000
ASRS Report	338402
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical inflight encounter : weather non adherence : published procedure other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	controller : issued new clearance flight crew : exited adverse environment flight crew : declared emergency other
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

While descending through FL250 (with engine heat on) throttles were retarded to idle. Cabin pressure went to maximum climb. No pack or bleed trips occurred. Cabin could not be controled in standby or manual. Emergency descent was requested and completed to 11000 ft. Cabin reached a maximum of 12000 ft. No oxygen masks deployed. No injuries to anyone. All pilot manual procedures accomplished. Emergency handling discontinued and aircraft landed normally at atlanta.

Original NASA ASRS Text

Title: EMER DSCNT CLRNC REQUESTED BY PIC OF B727 AS ACFT LOSES CABIN PRESSURE DURING DSCNT IN ICING CONDITIONS.

Narrative: WHILE DSNDING THROUGH FL250 (WITH ENG HEAT ON) THROTTLES WERE RETARDED TO IDLE. CABIN PRESSURE WENT TO MAX CLB. NO PACK OR BLEED TRIPS OCCURRED. CABIN COULD NOT BE CTLED IN STANDBY OR MANUAL. EMER DSCNT WAS REQUESTED AND COMPLETED TO 11000 FT. CABIN REACHED A MAX OF 12000 FT. NO OXYGEN MASKS DEPLOYED. NO INJURIES TO ANYONE. ALL PLT MANUAL PROCS ACCOMPLISHED. EMER HANDLING DISCONTINUED AND ACFT LANDED NORMALLY AT ATLANTA.

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.

Emergency descent clearance requested by PIC of B727 as aircraft loses cabin pressure during descent in icing conditions.