Evasive action climb creates an altitude deviation altitude excursion.

Attributes
ACN	300578
Time
Date	199503
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : msp
State Reference	MN
Altitude	msl bound lower : 8000 msl bound upper : 9200
Environment
Flight Conditions	IMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : msp
Operator	common carrier : air carrier
Make Model Name	Commercial Fixed Wing
Operating Under FAR Part	Part 121
Navigation In Use	Other Other
Flight Phase	descent other
Route In Use	arrival other arrival star : star
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : flight engineer pilot : commercial pilot : atp
Experience	flight time last 90 days : 180 flight time total : 12000 flight time type : 4500
ASRS Report	300578
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : atp pilot : flight engineer pilot : commercial
Experience	flight time last 90 days : 210 flight time total : 5000 flight time type : 1500
ASRS Report	300435
Events
Anomaly	aircraft equipment problem : less severe altitude deviation : excursion from assigned altitude altitude deviation : undershoot inflight encounter : weather non adherence : clearance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified
Resolutory Action	flight crew : exited adverse environment flight crew : took evasive action
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	Pilot Deviation

Narrative:

On pilot's discretion descent from 10000 ft to 7000 ft, passing 8000 ft, got GPWS warnings 'terrain, too low, pull up.' started climb and warning stopped at approximately 9200 ft. Stopped climb, verified altimeter settings and altitude from ATC, approach control, then continued for normal approach. Suspect caused by temperature inversion layer. Temperature at 8000 ft was plus 13 degrees C, and plus 5 degrees C on the ground. Also, in heavy clouds and moderate rain.

Original NASA ASRS Text

Title: EVASIVE ACTION CLB CREATES AN ALTDEV ALT EXCURSION.

Narrative: ON PLT'S DISCRETION DSCNT FROM 10000 FT TO 7000 FT, PASSING 8000 FT, GOT GPWS WARNINGS 'TERRAIN, TOO LOW, PULL UP.' STARTED CLB AND WARNING STOPPED AT APPROX 9200 FT. STOPPED CLB, VERIFIED ALTIMETER SETTINGS AND ALT FROM ATC, APCH CTL, THEN CONTINUED FOR NORMAL APCH. SUSPECT CAUSED BY TEMP INVERSION LAYER. TEMP AT 8000 FT WAS PLUS 13 DEGS C, AND PLUS 5 DEGS C ON THE GND. ALSO, IN HVY CLOUDS AND MODERATE RAIN.

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.