Flight crew behavior fatigue cited as cause of flight crew member falling asleep on final approach.

Attributes
ACN	246220
Time
Date	199307
Day	Fri
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : orf
State Reference	VA
Altitude	agl bound lower : 500 agl bound upper : 500
Environment
Flight Conditions	Marginal
Light	Dusk
Aircraft 1
Controlling Facilities	tower : orf
Operator	common carrier : air carrier
Make Model Name	Light Transport, Low Wing, 2 Turboprop Eng
Navigation In Use	Other Other
Flight Phase	descent : approach
Route In Use	approach : straight in
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : cfi pilot : commercial
Experience	flight time last 90 days : 250 flight time total : 2000 flight time type : 600
ASRS Report	246220
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Events
Anomaly	aircraft equipment problem : less severe non adherence : published procedure other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : anomaly accepted
Consequence	other Other
Supplementary
Air Traffic Incident	Pilot Deviation other

Narrative:

The captain and I had been on duty since XA00 am. Arrival into orf was 1 hour late. During approach, we forgot our approach check and I fell asleep for 15-20 seconds while hand-flying the ILS to a visual. The captain awoke me by calling my high speed of 150 KTS (normal speed is 130 KTS). Reorientation was necessary and the subsequent landing was uneventful. Contributing factors were: 1) on duty for 13 1/2 hours. 2) heat, 90-95 degrees all day with the cockpit air conditioning pack inoperative. 3) this was the 5TH leg of a 6 leg day. Factors affecting performance: FAA regulations allow 16 hour days for part 135. Our total duty for the day ended at 15 1/2 hours. An AG00 am chkin was scheduled the next day! Upon arrival back to iad, the captain dozed momentarily and also forgot to do the approach check. We had both been seated, without getting up, for 3 1/2 hours.

Original NASA ASRS Text

Title: FLC BEHAVIOR FATIGUE CITED AS CAUSE OF FLC MEMBER FALLING ASLEEP ON FINAL APCH.

Narrative: THE CAPT AND I HAD BEEN ON DUTY SINCE XA00 AM. ARR INTO ORF WAS 1 HR LATE. DURING APCH, WE FORGOT OUR APCH CHK AND I FELL ASLEEP FOR 15-20 SECONDS WHILE HAND-FLYING THE ILS TO A VISUAL. THE CAPT AWOKE ME BY CALLING MY HIGH SPD OF 150 KTS (NORMAL SPD IS 130 KTS). REORIENTATION WAS NECESSARY AND THE SUBSEQUENT LNDG WAS UNEVENTFUL. CONTRIBUTING FACTORS WERE: 1) ON DUTY FOR 13 1/2 HRS. 2) HEAT, 90-95 DEGS ALL DAY WITH THE COCKPIT AIR CONDITIONING PACK INOP. 3) THIS WAS THE 5TH LEG OF A 6 LEG DAY. FACTORS AFFECTING PERFORMANCE: FAA REGS ALLOW 16 HR DAYS FOR PART 135. OUR TOTAL DUTY FOR THE DAY ENDED AT 15 1/2 HRS. AN AG00 AM CHKIN WAS SCHEDULED THE NEXT DAY! UPON ARR BACK TO IAD, THE CAPT DOZED MOMENTARILY AND ALSO FORGOT TO DO THE APCH CHK. WE HAD BOTH BEEN SEATED, WITHOUT GETTING UP, FOR 3 1/2 HRS.

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.