# NTSB IAD04LA005: Piper PA-44, N432PA, Prospect, PA, December 23, 2003 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: December 23, 2003, 11:05 local (16:05 UTC) - Place: Prospect, PA - Coordinates: 40.897777, -80.07917 - Nearby events: https://openairdocs.org/map.md?lat=40.8978&lon=-80.0792&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 2 serious - Status: Completed, report December 3, 2004 - Report: Approved by Office Director - Parties: FAA/FSDO, Textron Lycoming, New Piper Aircraft - NTSB case key (mKey): 58535 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=IAD04LA005 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/58535/pdf - Page: https://openairdocs.org/ntsb/IAD04LA005 ## Probable cause The flight instructor's improper in-flight decision, which included an inappropriate altitude selection for intentional single engine operation. Factors were the inability of the flight instructor to restart the right engine for undetermined reasons, and the early deployment of flaps and/or landing gear that did not allow the airplane to clear trees. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(total) - nonmechanical, maneuvering - engine shutdown - intentional, pilot in command(cfi) - procedures/directives - not successful, pilot in command(cfi) (contributing factor) - in-flight planning/decision - improper, pilot in command (cause) - 1 engine - inoperative - Forced landing, emergency descent/landing - In flight collision with object, emergency descent/landing - in-flight planning/decision - improper, pilot in command(cfi) (contributing factor) - object - tree(s) ## Analysis The flight instructor and the multi-engine student were conducting single-engine training. Approximately 2,000 - 2,500 feet agl, the flight instructor reduced power on the right engine to a zero-thrust setting. After maneuvering the airplane for 4-5 minutes, the instructor shut down the engine and feathered the propeller. After performing single engine maneuvers for about 5 minutes, the student attempted to restart the right engine "per the published procedure," which included unfeathering the propeller, but was unsuccessful. The instructor then noticed that the airplane had descended to an altitude of 1,300-1,500 feet agl, so he had the student fly the airplane while he attempted to restart the windmilling engine. When the airplane was 500-700 feet agl, the flight instructor took over the controls, and told the student that they were going to land in a field below. The flight instructor set up an approach to the field, and deployed the landing gear and 25-degrees flaps. While on the short-final leg of the approach, the airplane hit the tops of some trees bordering the field, then impacted the ground. A post-accident inspection of the left and right engines revealed no mechanical anomalies. A review of the flight instructor's logbook revealed that he had accumulated 4.8 hours of multi-engine airplane flight instruction experience. The flight school had an altitude of 3,000 feet agl established as their minimum for performing intentional single engine shut-down. According to the Piper PA-44 information manual, intentional one-engine operations should not be performed at an altitude of less than 4,000 feet above the ground. ## Factual narrative On December 23, 2003, at 1105 eastern standard time, a Piper PA-44, N432PA, was substantially damaged during a forced landing near Prospect, Pennsylvania. The certificated flight instructor and the certificated private pilot (multi-engine student) were seriously injured. Visual meteorological conditions prevailed, and no flight plan had been filed. The local instructional flight, which originated at Beaver County Airport (BVI), Beaver Falls, Pennsylvania, was conducted under 14 CFR Part 91. In an interview, the flight instructor stated that he had planned to demonstrate single engine maneuvers including Vmc and drag characteristics, engine shutdown and restart, and several single engine approaches to full stop landings. After takeoff, the airplane proceeded to a practice area, where ground elevation varied between 1,000 and 1,200 feet above mean sea level (msl). At an altitude between 3,000 and 3,500 feet msl, the flight instructor reduced power on the right engine to a zero-thrust setting, and maintained that setting for 4 to 5 minutes. The flight instructor and the student then shut down the engine, and feathered the propeller. After performing single engine maneuvers for another 5 minutes, the student attempted to restart of the right engine "per the published procedure," including unfeathering the propeller, but the restart was unsuccessful. The flight instructor then noticed that the airplane had descended to an altitude of 2,500 feet msl, so he had the student fly the airplane while he attempted to restart the windmilling engine. Initially, the airplane's descent airspeed was 88 knots (Vyse); however, the airplane was subsequently slowed to 82 knots (Vxse) in an attempt to arrest the descent. At 1,700 feet msl, the flight instructor began flying the airplane, and told the student that they were going to land in a field below. As the flight instructor approached the field, he deployed the landing gear, and set 25 degrees of flaps. While on the short-final leg of the approach, the airplane hit the tops of some trees bordering the field. The instructor lost consciousness, and awoke with the airplane on the ground. He then secured the airplane, made sure his student was conscious, and left to seek help. Also during the interview, the instructor noted that, while performing the ground run-up of the left engine, there was a 175-rpm drop during the magneto check. The instructor "cleared the plugs" by running the engine with a lean mixture. He then tested the magneto again and observed a 100-rpm drop. During the subsequent takeoff, all engine indications were normal. Inspection of the left and right engines revealed no mechanical anomalies. A review of the flight instructor's logbook revealed that he had received his multi-engine flight instructor rating on July 5, 2003, and that he began training his first multi-engine student on November 2, 2003. Prior to the accident, the flight instructor had accumulated 49.6 total hours of experience in multi-engine airplanes and 4.8 hours of multi-engine instructing experience. According to Federal Aviation Administration (FAA) inspectors, the area where the airplane made the forced landing was a small clearing next to a larger pasture, with 75-foot trees about 2/3 of the way around it. The airplane impacted rising terrain on a 40-foot hill, with a 30-degree up slope. The weather reported at Butler County Airport/K W Scholter Field (BTP), Butler, Pennsylvania, located about 9 nautical miles southeast of the accident site, at 1055, included winds from 210 degrees true at 5 knots, 10 statute miles visibility, few clouds at 2,900 feet, temperature 52 degrees Fahrenheit, dew point 40 degrees Fahrenheit, and a barometric pressure of 29.86 inches of mercury. According to the Piper PA-44 information manual, intentional one-engine operations should not be performed at an altitude of less than 4,000 feet above the ground. According to the "Climb Performance - One Engine Operating" chart, with a temperature of 52 degrees Fahrenheit on the surface, a pressure altitude of 2,000 feet, a gross weight of 3,670 pounds, at an airspeed of 88 knots, and in a clean configuration with the inoperative engine's propeller feathered, the airplane should have been able to attain a 180 feet per minute (fpm) climb rate. The information manual additionally stated that with the one propeller windmilling, and the landing gear and flaps in the retracted position, the airplane would have incurred a -200 fpm climb performance penalty. ## Aircraft - Registration: [N432PA](https://openairdocs.org/deregistered/N432PA-2015-05-11), registration cancelled 2015-05-11, S/N 4496058, built 2001 (OpenAirDocs) - Reported make and model: Piper PA-44 - Registry model: [Piper PA-44-180](https://openairdocs.org/model/piper-pa-44-180) (registry code 7104402) (OpenAirDocs) - Registry engine: [Lycoming 0-360-A1D](https://openairdocs.org/engine/lycoming-0-360-a1d) (registry code 41504, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: 4496058 - Airframe hours: 2077.6 - Engines: Lycoming IO-360-A1H6 180 horsepower reciprocating; Lycoming IO-360-A1H6 180 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Beaver Aviation Service Inc., doing business as PanAm International Flight Academy - Registered owner: E W Holding Inc. - Airworthiness certificate: Standard, Normal - Last inspection: 100 hour, October 21, 2003, 62.3 hours before - Departed: BVI, Beaver Falls, PA ## Flight crew As NTSB recorded them. NTSB leaves out names. - Flight instructor; age 23; injuries: serious; flight instructor, commercial; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 1, valid medical--w/ waivers/lim; last flight review July 25, 2003; seat: right; flight hours: 900 total, 28 in this make and model, 780 as pilot in command, 141 in the last 90 days, 22 in the last 30 days, 0 in the last 24 hours - Student pilot; age 20; injuries: serious; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 1, valid medical--no waivers/lim.; last flight review June 23, 2003; seat: left; flight hours: 180 total, 7 in this make and model, 120 as pilot in command ## Weather - Conditions: Visual (VMC), Day - Wind: 210° at 5 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 52 °F, dew point 39 °F - Altimeter: 29.86 inHg - Observed at: BTP, 9 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 20031223034099A](https://openairdocs.org/incident/20031223034099A), Dec 23, 2003: Piper PA44180, Butler, PA, Substantial damage. (-23) On December 23, 2003, at approximately 11:00 eastern standard time, N432PA, a Piper PA-44-180 seminole was substantially damaged during an off airport… 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.