# NTSB NYC94LA073: Burkhart Grob G109B, N403DW, Nashua, NH, March 25, 1994 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: March 25, 1994, 10:33 local (14:33 UTC) - Place: Nashua, NH - Location: 42.7824° N, 71.5141° W: Placed by OpenAirDocs at BOIRE FLD (ASH), within about a mile (OpenAirDocs) - Nearby events: https://openairdocs.org/map.md?lat=42.7824&lon=-71.5141&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor, 1 uninjured - Status: Completed, report February 14, 1995 - Report: Approved by Office Director - NTSB case key (mKey): 38746 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC94LA073 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/38746/pdf - Page: https://openairdocs.org/ntsb/NYC94LA073 ## Probable cause THE CERTIFIED FLIGHT INSTRUCTOR'S DELAY IN TAKING REMEDIAL ACTION, WHICH RESULTED IN THE MOTOR-GLIDER COLLIDING WITH TREES. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, maneuvering - turn to landing area (emergency) - emergency procedure - simulated, dual student - airspeed - not maintained, dual student (cause) - stall - inadvertent, dual student - remedial action - delayed, pilot in command(cfi) (cause) - In flight collision with object, go-around (vfr) - object - tree(s) ## Analysis THIS WAS A TRAINING FLIGHT WITH A CERTIFIED FLIGHT INSTRUCTOR (CFI) AND A RATED STUDENT PILOT (RSP), IN A MOTOR-GLIDER. THE CFI HAD INFORMED THE TOWER CONTROLLERS THAT HE PLANNED TO PRACTICE A SIMULATED ROPE BRAKE AFTER TAKEOFF. AT 525 FEET THE CFI REDUCED THE POWER TO IDLE AND THE RSP INITIATED A 30 DEGREE BANK TO THE RIGHT TO RETURN TO THE RUNWAY. AFTER 120 DEGREES OF TURN, AS THE RSP AND CFI LOOKED OVER THEIR SHOULDERS TOWARD THE RUNWAY, THE RIGHT WING DROPPED AND THE BANK ANGLE INCREASED TO ABOUT 65 DEGREES. THE CFI TOOK THE CONTROLS, LEVELED THE WINGS AND ADDED POWER. THE GLIDER THEN COLLIDED WITH TREES. ## Factual narrative On March 25, 1994, about 1033 eastern standard time, a Grob G109B, motor-glider, piloted by Barry Meeker, was substantially damaged during a practice forced landing to Boire Field, Nashua, New Hampshire. The certified flight instructor (CFI) received minor injuries and the rated student pilot (RSP) was uninjured. Visual meteorological conditions prevailed. A flight plan had not been filed for the flight operating under 14 CFR 91. In the NTSB Form 6120.1/2, the CFI stated that the flight was to simulate an engine loss on takeoff. After the takeoff, at about 525 feet, the power was reduced to idle and a 30 degree bank to the right was initiated by the RSP. The CFI further stated: "...120 degrees of turn was completed when the student and instructor looked over their shoulders at the runway, at this time [the] glider quickly increased bank to 60 to 70 degrees, power was added and the wings were leveled, but too much altitude was lost and the glider would not clear the trees on the east side of Nashua's runway. The glider lost speed in the treetops and entered a spin, hitting nose first next to the runway." The Federal Aviation Administration (FAA) Inspector's report stated that during an interview, the CFI stated after 120 degrees of turn, when the right wing dropped, the CFI took the controls, added power and leveled the wings. The report further stated that there were three Air Traffic Controllers on duty in the Nashua Control Tower at the time of the accident. The controllers told the Inspector that the pilot had requested a simulated "rope break" and he would start his turn at 500 feet. After the motor-glider departed runway 32, the controllers observed the glider in a right turn off the departure end of the runway and it "looked low." They observed the aircraft clip the trees and impact the ground. ## Aircraft - Registration: [N403DW](https://openairdocs.org/deregistered/N403DW-1996-10-07), registration cancelled 1996-10-07, S/N 6304 (OpenAirDocs) - Reported make and model: Burkhart Grob G109B - Registry model: [Burkhart Grob G-109B](https://openairdocs.org/model/burkhart-grob-g-109b) (registry code 1660205) (OpenAirDocs) - Category: Glider - Serial number: 6304 - Airframe hours: 1158 - Engines: GROB 2500O-E1 60 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Registered owner: Frank C. Waller - Airworthiness certificate: Standard, Normal - Last inspection: Annual, December 14, 1993 - Airport: ASH, Boire Field, runway 32, 5,500 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 31; commercial, flight instructor; airplane ratings: single-engine land, multi-engine land; instrument ratings: airplane; medical: class 2, valid medical--w/ waivers/lim; seat: right; flight hours: 560 total, 62 in this make and model, 422 as pilot in command, 29 in the last 90 days, 22 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 7 statute miles - Lowest ceiling: 10,000 ft broken - Temperature: 46 °F - Altimeter: 29.00 inHg - Observed at: ASH ## 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 19940325006609A](https://openairdocs.org/incident/19940325006609A), Mar 25, 1994: Grob G109B, Nashua, NH, Substantial damage. Simulated rope break on takeoff in motor glider. Turned back too low hit trees and spun in. 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.