An MD80 departing tus encounters wind shear. Flight crew uses maximum power to depart wind shear are...

Attributes
ACN	413246
Time
Date	199808
Day	Mon
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : tus
State Reference	AZ
Altitude	agl bound lower : 900 agl bound upper : 900
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : tus
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	Other
Flight Phase	climbout : initial
Route In Use	departure other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
ASRS Report	413246
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : commercial
Events
Anomaly	inflight encounter : weather other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : unspecified other flight crewa
Resolutory Action	flight crew : declared emergency none taken : anomaly accepted none taken : unable
Consequence	Other
Supplementary
Primary Problem	Weather

Narrative:

XA10Z, tus tower. Departure 11L at tus. WX at tus was clear and 102 degrees F. Takeoff data allowed a flex takeoff, however, with a high temperature and a 2600 ft MSL field elevation we opted for a maximum power takeoff. At 900 ft afl on departure, with first officer flying, the wind shear aural warning sounded. The first officer pushed the throttles full forward and increased pitch from 10-15 degrees. Total loss of airspeed was 10 KTS and airspeed remained stagnant at 160 KTS for approximately 5 seconds, then began to accelerate again. Egt was quickly checked and noted at approximately 645 degrees on both engines. After noting volume 1 overspd and overtemp guidelines, we decided to divert to dfw instead of continuing to ord. All engine indications were normal. However, I felt that it would be prudent to allow dfw maintenance the opportunity to inspect the engines for possible damage. Additionally, we were not sure if an overspd situation had occurred on either engine. We received priority vectors from ATC and accomplished an idle power descent to runway 17C at dfw. Landing and taxi were uneventful.

Original NASA ASRS Text

Title: AN MD80 DEPARTING TUS ENCOUNTERS WIND SHEAR. FLC USES MAX PWR TO DEPART WIND SHEAR AREA. FLC DIVERTS TO A MAINT STATION FOR ENG INSPECTION BECAUSE OF THE USE OF MAX PWR.

Narrative: XA10Z, TUS TWR. DEP 11L AT TUS. WX AT TUS WAS CLR AND 102 DEGS F. TKOF DATA ALLOWED A FLEX TKOF, HOWEVER, WITH A HIGH TEMP AND A 2600 FT MSL FIELD ELEVATION WE OPTED FOR A MAX PWR TKOF. AT 900 FT AFL ON DEP, WITH FO FLYING, THE WIND SHEAR AURAL WARNING SOUNDED. THE FO PUSHED THE THROTTLES FULL FORWARD AND INCREASED PITCH FROM 10-15 DEGS. TOTAL LOSS OF AIRSPD WAS 10 KTS AND AIRSPD REMAINED STAGNANT AT 160 KTS FOR APPROX 5 SECONDS, THEN BEGAN TO ACCELERATE AGAIN. EGT WAS QUICKLY CHKED AND NOTED AT APPROX 645 DEGS ON BOTH ENGS. AFTER NOTING VOLUME 1 OVERSPD AND OVERTEMP GUIDELINES, WE DECIDED TO DIVERT TO DFW INSTEAD OF CONTINUING TO ORD. ALL ENG INDICATIONS WERE NORMAL. HOWEVER, I FELT THAT IT WOULD BE PRUDENT TO ALLOW DFW MAINT THE OPPORTUNITY TO INSPECT THE ENGS FOR POSSIBLE DAMAGE. ADDITIONALLY, WE WERE NOT SURE IF AN OVERSPD SIT HAD OCCURRED ON EITHER ENG. WE RECEIVED PRIORITY VECTORS FROM ATC AND ACCOMPLISHED AN IDLE PWR DSCNT TO RWY 17C AT DFW. LNDG AND TAXI WERE UNEVENTFUL.

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.

An MD80 departing tus encounters wind shear. Flight crew uses maximum power to depart wind shear area. Flight crew diverts to a maintenance station for engine inspection because of the use of maximum power.