Engine out practice during training flight for water lndgs, slow speed, high sink rate, recovery too...

Attributes
ACN	300131
Time
Date	199503
Day	Wed
Local Time Of Day	0601 To 1200
Place
Locale Reference	atc facility : mlb
State Reference	FL
Altitude	agl bound lower : 0 agl bound upper : 200
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	descent : approach landing other
Flight Plan	None
Person 1
Affiliation	Other
Function	instruction : instructor
Qualification	other other : other pilot : commercial pilot : instrument pilot : cfi
Experience	flight time last 90 days : 40 flight time total : 380 flight time type : 10
ASRS Report	300131
Person 2
Affiliation	Other
Function	instruction : trainee
Qualification	pilot : private
Events
Anomaly	conflict : ground critical other anomaly other
Independent Detector	other flight crewa
Resolutory Action	none taken : insufficient time other
Consequence	other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were working on simulated engine-outs after water takeoffs resulting in a glide to a water landing. The student performed the first takeoff, engine-out, and power-off landing quite well. The second takeoff began well like the first. I decided to do another engine failure after the flap retraction during the climb so to include lowering the flaps in the student's emergency checklist. This aircraft has an engine mounted on top of the fuselage, so a power reduction results in a rapid pitch up attitude and an equally rapid loss of airspeed. The proper recovery technique is to lower the nose with almost full forward elevator, accelerate to 85 mph and lower the flaps for landing. The student was slow pushing the nose over resulting in an airspeed loss from 75 mph to 65 mph in about 2 seconds. At this point, I elected to take control of the aircraft. At an altitude of 200 ft I applied full power, pitched the nose further down and lowered the flaps. The rate of descent was rapid and upon reaching 65-70 mph I changed the attitude to level flight to try to slow the rate of descent without stalling. The aircraft bounced hard, denting the hull and the sponson. In retrospect, leaving a larger safety envelope for the maneuver, me not totally realizing how much drag the aircraft produced, and me letting the airspeed drop too low were all contributing factors to the incident.

Original NASA ASRS Text

Title: ENG OUT PRACTICE DURING TRAINING FLT FOR WATER LNDGS, SLOW SPD, HIGH SINK RATE, RECOVERY TOO LATE RESULTING IN HARD LNDG AND ACFT DAMAGE.

Narrative: WE WERE WORKING ON SIMULATED ENG-OUTS AFTER WATER TKOFS RESULTING IN A GLIDE TO A WATER LNDG. THE STUDENT PERFORMED THE FIRST TKOF, ENG-OUT, AND PWR-OFF LNDG QUITE WELL. THE SECOND TKOF BEGAN WELL LIKE THE FIRST. I DECIDED TO DO ANOTHER ENG FAILURE AFTER THE FLAP RETRACTION DURING THE CLB SO TO INCLUDE LOWERING THE FLAPS IN THE STUDENT'S EMER CHKLIST. THIS ACFT HAS AN ENG MOUNTED ON TOP OF THE FUSELAGE, SO A PWR REDUCTION RESULTS IN A RAPID PITCH UP ATTITUDE AND AN EQUALLY RAPID LOSS OF AIRSPD. THE PROPER RECOVERY TECHNIQUE IS TO LOWER THE NOSE WITH ALMOST FULL FORWARD ELEVATOR, ACCELERATE TO 85 MPH AND LOWER THE FLAPS FOR LNDG. THE STUDENT WAS SLOW PUSHING THE NOSE OVER RESULTING IN AN AIRSPD LOSS FROM 75 MPH TO 65 MPH IN ABOUT 2 SECONDS. AT THIS POINT, I ELECTED TO TAKE CTL OF THE ACFT. AT AN ALT OF 200 FT I APPLIED FULL PWR, PITCHED THE NOSE FURTHER DOWN AND LOWERED THE FLAPS. THE RATE OF DSCNT WAS RAPID AND UPON REACHING 65-70 MPH I CHANGED THE ATTITUDE TO LEVEL FLT TO TRY TO SLOW THE RATE OF DSCNT WITHOUT STALLING. THE ACFT BOUNCED HARD, DENTING THE HULL AND THE SPONSON. IN RETROSPECT, LEAVING A LARGER SAFETY ENVELOPE FOR THE MANEUVER, ME NOT TOTALLY REALIZING HOW MUCH DRAG THE ACFT PRODUCED, AND ME LETTING THE AIRSPD DROP TOO LOW WERE ALL CONTRIBUTING FACTORS TO THE INCIDENT.

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.

Engine out practice during training flight for water lndgs, slow speed, high sink rate, recovery too late resulting in hard landing and aircraft damage.