20140329004029A

Accident · Substantial damage

FAA accident report · Aviat A-1B · AZ · March 29, 2014

Date
March 29, 2014 · 07:15 local
Place
AZ
Phase of flight
Landing: Rollout
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N33HY
NTSB investigation
NTSBWPR14CA151
Reported as
Aviat A-1B
Reported engine
Lycoming O-360-A1P
People aboard
1
Fatal injuries
0
Other injuries
0
Pilot’s certificate
Private pilot
Pilot’s flight hours
735 total435 in this make and model14 in the last 90 days

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

During a telephone interview airman explained the accident. Airman had flown earlier in the day to eloy AZ. To have breakfast with a friend. After departing eloy he went to an un-named desert strip approximately two miles east of newman's peak. This is approximately 70 miles south of phoenix and adjacent to I-10 highway. He had accomplished one touch and go and was coming around for another. Airman stated he touched down normally tailwheel first, as per the manufacturer's recommendation. He applied forward control stick pressure to raise the tail while simultaneously applying full throttle. After he had applied full throttle he dropped his left hand off the throttle control to reach down and reset the elevator trim wheel for take off. At about this point in the touch and go the nose of the aircraft abruptly turned to the right and the aircraft ground looped, the left gear collapesed and the left wing contacted the ground. After the aircraft came to a stop airman turned off all the switches in the cockpit and exited the aircraft. Airman went on to state that after he had thought about it and replayed the whole sequence in his mind he realized he did not apply enough forward pressure on the control stick. Consequently when he applied power for take-off the tail wheel was still fully in contact with the ground and under load. The application of engine power, the application of right rudder to counter act the p factor and the fact that the tail wheel was still on the ground was the ideal recipe for a ground loop.

As the FAA filed it

DURING A TELEPHONE INTERVIEW AIRMAN EXPLAINED THE ACCIDENT. AIRMAN HAD FLOWN EARLIER IN THE DAY TO ELOY AZ. TO HAVE BREAKFAST WITH A FRIEND. AFTER DEPARTING ELOY HE WENT TO AN UN-NAMED DESERT STRIP APPROXIMATELY TWO MILES EAST OF NEWMAN'S PEAK. THIS IS APPROXIMATELY 70 MILES SOUTH OF PHOENIX AND ADJACENT TO I-10 HIGHWAY. HE HAD ACCOMPLISHED ONE TOUCH AND GO AND WAS COMING AROUND FOR ANOTHER. AIRMAN STATED HE TOUCHED DOWN NORMALLY TAILWHEEL FIRST, AS PER THE MANUFACTURER'S RECOMMENDATION. HE APPLIED FORWARD CONTROL STICK PRESSURE TO RAISE THE TAIL WHILE SIMULTANEOUSLY APPLYING FULL THROTTLE. AFTER HE HAD APPLIED FULL THROTTLE HE DROPPED HIS LEFT HAND OFF THE THROTTLE CONTROL TO REACH DOWN AND RESET THE ELEVATOR TRIM WHEEL FOR TAKE OFF. AT ABOUT THIS POINT IN THE TOUCH AND GO THE NOSE OF THE AIRCRAFT ABRUPTLY TURNED TO THE RIGHT AND THE AIRCRAFT GROUND LOOPED, THE LEFT GEAR COLLAPESED AND THE LEFT WING CONTACTED THE GROUND. AFTER THE AIRCRAFT CAME TO A STOP AIRMAN TURNED OFF ALL THE SWITCHES IN THE COCKPIT AND EXITED THE AIRCRAFT. AIRMAN WENT ON TO STATE THAT AFTER HE HAD THOUGHT ABOUT IT AND REPLAYED THE WHOLE SEQUENCE IN HIS MIND HE REALIZED HE DID NOT APPLY ENOUGH FORWARD PRESSURE ON THE CONTROL STICK. CONSEQUENTLY WHEN HE APPLIED POWER FOR TAKE-OFF THE TAIL WHEEL WAS STILL FULLY IN CONTACT WITH THE GROUND AND UNDER LOAD. THE APPLICATION OF ENGINE POWER, THE APPLICATION OF RIGHT RUDDER TO COUNTER ACT THE P FACTOR AND THE FACT THAT THE TAIL WHEEL WAS STILL ON THE GROUND WAS THE IDEAL RECIPE FOR A GROUND LOOP.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

Other reports on N33HY · 1

Matched to the same aircraft by N-number and date.