An SF340 pitot tube cover melted on heated pitot tube.

Attributes
ACN	636947
Time
Date	200411
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : aty.airport
State Reference	SD
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	SF 340A
Operating Under FAR Part	Part 121
Flight Phase	ground : parked ground other : overnight
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : multi engine pilot : instrument pilot : commercial pilot : atp
Experience	flight time last 90 days : 230 flight time total : 7000 flight time type : 6000
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Experience	flight time last 90 days : 240 flight time total : 5150 flight time type : 4000
ASRS Report	636950
Events
Anomaly	aircraft equipment problem : critical non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Consequence	other
Supplementary
Problem Areas	Cabin Crew Human Performance Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance

Narrative:

On shutdown checklist pitot tube heat may have been left on, or after deplaning, ramp personnel could have turned it on, or pitot cover may have been installed before pitot tube cooled. Pitot tube cover melted onto pitot tube. Late at night fatigue could have been an issue, although the first officer and I checked it 4 times. We could have missed it (most likely). Supplemental information from acn 636950: we completed a trip in aty with after landing checklists and shutdown/termination checklists. Retired to hotel. Morning crew found pitot cover to be melted onto pitot tube. Human factor: we may have left pitot switch on.

Original NASA ASRS Text

Title: AN SF340 PITOT TUBE COVER MELTED ON HEATED PITOT TUBE.

Narrative: ON SHUTDOWN CHKLIST PITOT TUBE HEAT MAY HAVE BEEN LEFT ON, OR AFTER DEPLANING, RAMP PERSONNEL COULD HAVE TURNED IT ON, OR PITOT COVER MAY HAVE BEEN INSTALLED BEFORE PITOT TUBE COOLED. PITOT TUBE COVER MELTED ONTO PITOT TUBE. LATE AT NIGHT FATIGUE COULD HAVE BEEN AN ISSUE, ALTHOUGH THE FO AND I CHKED IT 4 TIMES. WE COULD HAVE MISSED IT (MOST LIKELY). SUPPLEMENTAL INFO FROM ACN 636950: WE COMPLETED A TRIP IN ATY WITH AFTER LNDG CHKLISTS AND SHUTDOWN/TERMINATION CHKLISTS. RETIRED TO HOTEL. MORNING CREW FOUND PITOT COVER TO BE MELTED ONTO PITOT TUBE. HUMAN FACTOR: WE MAY HAVE LEFT PITOT SWITCH ON.

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.