# NTSB LAX99LA073: Piper PA-28-181, N4129S, Arlington, AZ, January 11, 1999 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: January 11, 1999, 07:44 local (14:44 UTC) - Place: Arlington, AZ - Coordinates: 33.180225, -112.789337 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=33.1802&lon=-112.7893&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 2 uninjured - Status: Completed, report January 18, 2001 - Report: Approved by Office Director - NTSB case key (mKey): 45631 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX99LA073 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/45631/pdf - Page: https://openairdocs.org/ntsb/LAX99LA073 ## Probable cause The flight instructor's inadequate supervision of his student and his failure to initiate timely remedial action. Contributing factors were the student's failure to maintain the proper glidepath under the existing downdraft condition, the flight instructor's failure to adhere to the company procedure regarding minimum safe altitudes for termination of practice forced landings. Additional contributing factors were the downdraft condition and the power. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - In flight collision with object, approach - vfr pattern - final approach - weather condition - downdraft (contributing factor) - object - wire,transmission (contributing factor) - object - residence - proper glidepath - not obtained/maintained, dual student (contributing factor) - procedures/directives - not complied with, pilot in command(cfi) (contributing factor) - supervision - inadequate, pilot in command(cfi) (cause) - remedial action - delayed, pilot in command(cfi) (contributing factor) - altitude/clearance - inadequate, pilot in command(cfi) (cause) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis The certified flight instructor (CFI) was familiar with the area, and he initiated a simulated total loss of engine power for a practice forced landing for his student as they approached a crop duster airstrip. The dirt airstrip is located on a small bluff, and approaching it they encountered a downdraft. The student reset the wing flaps from 40 to 25 degrees; however, the airplane descended below the desired glide path. The CFI allowed the student to continue approaching the airstrip. The CFI directed that a go-around be initiated, and engine power was rapidly applied. Seconds later, the airplane impacted a residential service power line and an unoccupied house as the power was increasing. The airplane came to rest about 550 short of the airstrip. The operator, who employed the CFI, reported that it had provided the CFI with written guidance regarding the minimum altitude at which go-arounds were to be initiated during the practice of simulated forced landings. In pertinent part, the operator's Procedures and Techniques manual stated the following: 'Every go around from a simulated engine failure shall be performed by the student prior to 500 feet AGL if not approaching a paved runway.' ## Factual narrative On January 11, 1999, at 0744 hours mountain standard time, a Piper PA-28-181, N4129S, operated by the Airline Training Center Arizona, Inc., collided with a residential service power line and an unoccupied house during a practice forced landing near Arlington, Arizona. Visual meteorological conditions prevailed during the instructional flight which was performed under 14 CFR Part 91, and no flight plan was filed. The airplane was destroyed, and the certified flight instructor (CFI), who held an airline transport pilot certificate, received minor injuries. The private pilot, who was receiving a postcertification (nonregulatory) progress check, and a passenger were not injured. The flight originated from Goodyear, Arizona, about 0700. The operator estimated that the initial point of impact occurred over the house approximately 800 feet mean sea level (msl), and about 12 feet above ground level. The location was about 550 feet short of the approach end of a dirt airstrip used by crop dusters. According to the CFI, he was familiar with the area and initiated the simulated total loss of engine power approaching the airstrip at 2,000 feet msl. The airstrip is located on a small bluff, and the airplane encountered a downdraft as it approached. The CFI directed that the student retract the wing flaps when the airplane descended below the desired glide path. The student, who was handling the flight controls, complied with the CFI's instructions. The CFI reported that seconds prior to the collision he directed that a go-around be initiated. The student applied full engine power; however, within seconds the collision occurred. The engine had not come up to full power. The student made the following written statement regarding the sequence of events: "First I was too high so I went to flaps 40 degrees. But after recognizing [I was] getting too low and slow, I raised [the flaps] to 25 degrees. I pushed the nose over and saw the power line. [I] wanted to make a go around but the [engine] power didn't come up fast enough. My IP [CFI] grabbed the wheel, turned and pulled up, and in the next moment we crashed into the lines." The operator, who employed the CFI, reported that it had provided the CFI with written guidance regarding the minimum altitude at which go-arounds were to be initiated during the practice of simulated forced landings. In pertinent part, the operator's Procedures and Techniques manual stated the following: "Every go around from a simulated engine failure shall be performed by the student prior to 500 feet AGL if not approaching a paved runway." ## Aircraft - Registration: [N4129S](https://openairdocs.org/deregistered/N4129S-1999-08-05), registration cancelled 1999-08-05, S/N 2843123 (OpenAirDocs) - Reported make and model: Piper PA-28-181 - Registry model: [Piper PA-28-181](https://openairdocs.org/model/piper-pa-28-181) (registry code 7102807) (OpenAirDocs) - Category: Airplane - Serial number: 2843123 - Airframe hours: 785 - Engines: Lycoming O-360-A4M 180 horsepower reciprocating - Damage: Destroyed - Flight: Instructional, Part 91 - Registered owner: Airline Training Center Az,Inc - Airworthiness certificate: Standard, Normal - Last inspection: AAIP, December 20, 1998, 45 hours before - Departed: GYR, GOODYEAR, AZ ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 57; airline transport, flight instructor; airplane ratings: multi-engine land, single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; seat: right; flight hours: 12,514 total, 219 in this make and model, 10,393 as pilot in command, 134 in the last 90 days, 45 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 60° at 6 knots - Visibility: 30 statute miles - Lowest ceiling: none - Temperature: 46 °F, dew point 25 °F - Altimeter: 30.00 inHg - Observed at: GYR, 20 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 19990111000419A](https://openairdocs.org/incident/19990111000419A), Jan 11, 1999: Piper PA28181, Arlington, AZ, Destroyed. (.19) On January 11, 1999, at 0744 hours mountain standard time, a Piper PA-28-181, N4129S, operated by the airline training center Arizona, inc., collided… From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.