Flight crew of an medium large transport could not hold altitude for a short time due to severe turbulence causing the autoplt to disengage and the left engine to briefly stall. The flight crew subsequently diverted to a closer airport.

Home

Browse by month

Random

Latest

About

Contact

Attributes
ACN	334493
Time
Date	199604
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : tpa
State Reference	FL
Altitude	msl bound lower : 28500 msl bound upper : 29200
Aircraft 1
Controlling Facilities	artcc : zhu tower : iah
Operator	common carrier : air carrier
Make Model Name	MD-80 Super 80
Operating Under FAR Part	Part 121
Flight Phase	cruise other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	334493
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	aircraft equipment problem : critical altitude deviation : excursion from assigned altitude inflight encounter : weather non adherence : clearance other anomaly other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	aircraft : equipment problem dissipated flight crew : returned to intended course or assigned course flight crew : overcame equipment problem
Consequence	Other
Supplementary
Primary Problem	Weather
Air Traffic Incident	other

Narrative:

Approximately 30-50 mi south of nepta intersection at FL290 experienced severe turbulence while deviating around WX. Autoplt disengaged we gained approximately 200 ft and lost 500 ft. While in turbulence left engine compressor stalled for approximately 20-30 seconds. When clear of turbulence, which lasted for approximately 30 seconds to 1 min, left engine compressor stall cleared. We declared an emergency but due to precipitation static we were unable to hear ATC. All flight attendants were seated and had been instructed to do so approximately 2-3 mins before incident. Passenger had been advised by both myself and flight attendants to stay seated with their seat belts on prior to incident. WX radar showed no significant returns within 25-30 mi of aircraft. Diverted to tpa, landed uneventfully. No passenger or crew injured.

Original NASA ASRS Text

Title: FLC OF AN MLG COULD NOT HOLD ALT FOR A SHORT TIME DUE TO SEVERE TURB CAUSING THE AUTOPLT TO DISENGAGE AND THE L ENG TO BRIEFLY STALL. THE FLC SUBSEQUENTLY DIVERTED TO A CLOSER ARPT.

Narrative: APPROX 30-50 MI S OF NEPTA INTXN AT FL290 EXPERIENCED SEVERE TURB WHILE DEVIATING AROUND WX. AUTOPLT DISENGAGED WE GAINED APPROX 200 FT AND LOST 500 FT. WHILE IN TURB L ENG COMPRESSOR STALLED FOR APPROX 20-30 SECONDS. WHEN CLR OF TURB, WHICH LASTED FOR APPROX 30 SECONDS TO 1 MIN, L ENG COMPRESSOR STALL CLRED. WE DECLARED AN EMER BUT DUE TO PRECIPITATION STATIC WE WERE UNABLE TO HEAR ATC. ALL FLT ATTENDANTS WERE SEATED AND HAD BEEN INSTRUCTED TO DO SO APPROX 2-3 MINS BEFORE INCIDENT. PAX HAD BEEN ADVISED BY BOTH MYSELF AND FLT ATTENDANTS TO STAY SEATED WITH THEIR SEAT BELTS ON PRIOR TO INCIDENT. WX RADAR SHOWED NO SIGNIFICANT RETURNS WITHIN 25-30 MI OF ACFT. DIVERTED TO TPA, LANDED UNEVENTFULLY. NO PAX OR CREW INJURED.

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.