A fatigued A319 flight crew reported encountering wake vortex on approach to lax; causing enough dis...

Attributes
ACN	899943
Time
Date	201007
Local Time Of Day	0601-1200
Place
Locale Reference	LAX.Airport
State Reference	CA
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Final Approach
Flight Plan	IFR
Aircraft 2
Make Model Name	B747 Undifferentiated or Other Model
Flight Phase	Initial Approach
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 172 Flight Crew Total 22713 Flight Crew Type 4365
Person 2
Function	Pilot Not Flying First Officer
Experience	Flight Crew Last 90 Days 150 Flight Crew Total 9000 Flight Crew Type 5970
Events
Anomaly	Deviation - Procedural Published Material / Policy Inflight Event / Encounter Wake Vortex Encounter

Narrative:

Creeping fatigue had a definite effect to cause me to not put the gear down in a timely manner. We were following a B747 on a visual approach by 4.5 miles. We encountered wake turbulence at about the time we usually put the gear down. We encountered it again at 1000 feet one dot above the glide slope and I remembered being annoyed that the B747 was high on glide slope. We missed the 1000 foot call. At 700 feet the gear warning bell sounded and we put the gear down before 500 feet. I remember thinking that as tired as we both were it would be safer to land than to go around beating ourselves up going around the pattern. I knew we had gear and full flaps so I used my emergency authority and landed. We had flown a tough three day trip were fatigue crept up on us. I felt ok [on departure]; however; I felt very tired at the top of descent. We had a very short night the night before. I believe that it was a chain of events that led to our not getting the gear down in a timely manner. Fortunately; the system worked and we landed safely.

Original NASA ASRS Text

Title: A fatigued A319 Flight Crew reported encountering wake vortex on approach to LAX; causing enough distraction that the gear was not extended until they got the warning.

Narrative: Creeping fatigue had a definite effect to cause me to not put the gear down in a timely manner. We were following a B747 on a visual approach by 4.5 miles. We encountered wake turbulence at about the time we usually put the gear down. We encountered it again at 1000 feet one dot above the glide slope and I remembered being annoyed that the B747 was high on glide slope. We missed the 1000 foot call. At 700 feet the gear warning bell sounded and we put the gear down before 500 feet. I remember thinking that as tired as we both were it would be safer to land than to go around beating ourselves up going around the pattern. I knew we had gear and full flaps so I used my emergency authority and landed. We had flown a tough three day trip were fatigue crept up on us. I felt OK [on departure]; however; I felt very tired at the top of descent. We had a very short night the night before. I believe that it was a chain of events that led to our not getting the gear down in a timely manner. Fortunately; the system worked and we landed safely.

Data retrieved from NASA's ASRS site as of April 2012 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.

A fatigued A319 flight crew reported encountering wake vortex on approach to lax; causing enough distraction that the gear was not extended until they got the warning.