Unable to raise gear after takeoff in icing conditions; MD80 encounters multiple system anomalies du...

Attributes
ACN	765665
Time
Date	200712
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 6000
Environment
Weather Elements	Rain Ice
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : zzz.tracon
Operator	common carrier : air carrier
Make Model Name	MD-80 Series (DC-9-80) Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Flight Phase	climbout : initial
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
ASRS Report	765665
Events
Anomaly	aircraft equipment problem : critical inflight encounter other other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : gear safe lights other flight crewa
Resolutory Action	flight crew : declared emergency flight crew : overcame equipment problem other
Supplementary
Problem Areas	Weather Aircraft
Primary Problem	Aircraft

Narrative:

On takeoff unable to retract nose gear. Procedures complied with; and gear still unable to retract. Leveled at 6000 ft and planned return to field. Declared emergency due to overweight landing; and unknown condition of nose gear. At 6000 ft; with engine and wing anti-ice on; we encountered severe icing conditions. Within a matter of seconds; pressurization was lost; and cabin climbed to 6000 ft. We also had stall warning failure light and no automatic spoiler lights on overhead panel. Also had aural takeoff warnings blaring flaps; spoilers; brakes. This we later learned was due to compression of nose gear strut causing air/ground logic to fail. First officer was flying aircraft; and immediate return to field was accomplished. Aircraft landed uneventfully at 134600 pounds; with less than 100 FPM descent at touchdown. Crash fire rescue equipment examined aircraft; noted nothing out of the ordinary; and aircraft was taxied uneventfully to gate. Large amounts of ice were present on all aircraft surfaces and probes during visual inspection after landing.

Original NASA ASRS Text

Title: UNABLE TO RAISE GEAR AFTER TKOF IN ICING CONDITIONS; MD80 ENCOUNTERS MULTIPLE SYSTEM ANOMALIES DUE TO NOSE GEAR STRUT SWITCH FAILURE.

Narrative: ON TKOF UNABLE TO RETRACT NOSE GEAR. PROCS COMPLIED WITH; AND GEAR STILL UNABLE TO RETRACT. LEVELED AT 6000 FT AND PLANNED RETURN TO FIELD. DECLARED EMER DUE TO OVERWT LNDG; AND UNKNOWN CONDITION OF NOSE GEAR. AT 6000 FT; WITH ENG AND WING ANTI-ICE ON; WE ENCOUNTERED SEVERE ICING CONDITIONS. WITHIN A MATTER OF SECONDS; PRESSURIZATION WAS LOST; AND CABIN CLBED TO 6000 FT. WE ALSO HAD STALL WARNING FAILURE LIGHT AND NO AUTO SPOILER LIGHTS ON OVERHEAD PANEL. ALSO HAD AURAL TKOF WARNINGS BLARING FLAPS; SPOILERS; BRAKES. THIS WE LATER LEARNED WAS DUE TO COMPRESSION OF NOSE GEAR STRUT CAUSING AIR/GND LOGIC TO FAIL. FO WAS FLYING ACFT; AND IMMEDIATE RETURN TO FIELD WAS ACCOMPLISHED. ACFT LANDED UNEVENTFULLY AT 134600 LBS; WITH LESS THAN 100 FPM DSCNT AT TOUCHDOWN. CFR EXAMINED ACFT; NOTED NOTHING OUT OF THE ORDINARY; AND ACFT WAS TAXIED UNEVENTFULLY TO GATE. LARGE AMOUNTS OF ICE WERE PRESENT ON ALL ACFT SURFACES AND PROBES DURING VISUAL INSPECTION AFTER LNDG.

Data retrieved from NASA's ASRS site as of January 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.

Unable to raise gear after takeoff in icing conditions; MD80 encounters multiple system anomalies due to nose gear strut switch failure.