ERA19TA122

NTSB accident investigation · Gulfstream GIV · Chamblee, GA · March 9, 2019

Accident · No injuriesClass 3Final report
Date
March 9, 2019, 15:47 local (20:47 UTC)
Place
Chamblee, GA
Injuries
14 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N505GFGulfstream GIV
Defining event
Landing-flare/touchdown: Landing area undershoot
Weather
Visual (VMC) · Day
Status
Completed
Report
Approved by Office Director
Investigation class
Class 3
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20190309001089A
Case key
99097

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Probable cause

The flight crew’s incorrect glidepath and flare to landing, which resulted in a landing area undershoot and the main landing gear’s collision with the runway threshold.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: landing flareAircraft › Aircraft oper/perf/capability · Incorrect use/operationGulfstream Aerospace G-IV: 1 caseAll aircraft: 1,285 casesProbable cause
Performance/control parameters: descent/approach/glide pathAircraft › Aircraft oper/perf/capability · Incorrect use/operationGulfstream Aerospace G-IV: 1 caseAll aircraft: 809 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · Flight crewGulfstream Aerospace G-IV: 1 caseAll aircraft: 9,295 casesProbable cause

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The flight crew were preparing to land after a cross-country corporate flight with 12 passengers. The pilot reported that the approach was normal but that, during the landing flare, he felt an “unusually hard impact.” The landing roll and taxi to the runway were uneventful. Examination of the airplane revealed substantial damage to the fuselage, and photographs revealed two tire tracks in the grass about 18 ft before the runway threshold and loose dirt and grass around the threshold, consistent with the airplane's main landing gear touching down in the grass and subsequently impacting the threshold. The pilot flying reported that this was his first landing on that runway at the destination airport. The flight crew did not report any preimpact mechanical malfunctions or failures with the airplane. It is likely that the flight crew failed to maintain the proper glidepath during the approach.

Factual narrative

On March 9, 2019, at 1547 eastern standard time, a Gulfstream G-IV, N505GF, was substantially damaged during landing at Dekalb-Peachtree Airport (PDK) Chamblee, Georgia. The two airline transport pilots and 12 passengers were not injured. The airplane was registered to and operated by Waffle House Inc. under the provisions of Title 14 Code of Federal Regulations Part 91 as a corporate flight. Day visual meteorological conditions prevailed, and an instrument flight rules flight plan was filed for the flight, which originated from Bozeman Yellowstone International Airport (BZN), Bozeman, Montana, about 1236. The crew reported that the enroute portion of the flight was normal. Upon arrival into the Atlanta area, air traffic control advised them runway 34 at PDK, which was 3,967-ft-long, was in use and runway 21L/ 3R, which was 6,001-ft-long, was closed until 1600, which was about 20 minutes from then. The crew requested to hold until the longer runway opened, but shortly thereafter after determining they had the landing performance, advised that they would be able to land on runway 34. The pilot reported that the approach to landing was normal, but during the landing flare, he felt an "unusually hard impact." The landing roll and taxi to the ramp were uneventful. During a hard landing inspection, substantial damage was found to the fuselage. The flight crew did not report any preimpact mechanical malfunctions or failures with the airplane. The pilot flying reported that this was his first landing on runway 34 at PDK Photographs provided by the airport manager revealed that two tire tracks commenced in the grass about 18 ft prior to the runway 34 threshold, and lose dirt and grass were observed around the threshold. According to Federal Aviation Administration (FAA) airman records, the pilot flying held an airline transport pilot certificate and was issued a first-class medical certificate in January 2019. He reported a total flight time of 4,920 hours, of which 125 hours were in the accident airplane make and model. The second pilot held an airline transport pilot certificate and was issued a first-class medical certificate in May 2018. He reported a total flight time of 8,139 flight hours, of which 972 hours were in the accident airplane make and model. According to FAA airworthiness records, the airplane was powered by two turbo-fan Rolls-Royce Tay 611-8 engines. The most recent continuous airworthiness inspection was completed in February 2019. At 1553, the reported weather at PDK included 6 statute miles visibility, haze, a broken cloud layer at 3,700 ft above ground level, variable wind at 4 knots, temperature 17°C, dew point 12°C, and barometric pressure of 30.01 inches of mercury.

Aircraft

Registration
N505GF
Reported as
Gulfstream GIV (UNDESIGNAT)
Category
Airplane
Serial number
1275
Built
1995
Airframe hours
14,406.3
Engines
Rolls-Royce TAY 611-8, 13,850 lbs thrust, turbo fanRolls-Royce TAY 611-8, 13,850 lbs thrust, turbo fan
Damage
Substantial damage
Flight
Executive/Corporate · Part 91
Operator
Waffle House Inc.
Registered owner
WH Air Inc.
Airworthiness certificate
Standard, Normal
Last inspection
Continuous airworthiness · February 20, 2019
Departed
BZN · Bozeman, MT
Destination
PDK · Chamblee, GA
Flight plan
IFR
Airport
PDK · Dekalb-Peachtree, runway 34, 3,967 × 150 ft, asphalt
Equipment
Angle of attack indicator, ADS-B, Stall warning system, Onboard weather, Electronic primary flight display, Electronic multifunction display, Electronic flight bag or handheld device, Data recorder, Auto-pilot

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew · 2

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
46
Injuries
None
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, With waivers/limitations
Last flight review
January 24, 2019
Seat
Left
Restraint
5-point
Flight hours
4,920 total · 125 in this make and model · 2,800 as pilot in command · 36 in the last 90 days · 10 in the last 30 days
Role
Pilot
Age
47
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Helicopter, Airplane
Medical
Class 1, With waivers/limitations
Last flight review
May 10, 2018
Seat
Right
Restraint
5-point
Flight hours
8,139 total · 972 in this make and model · 5,789 as pilot in command · 46 in the last 90 days · 25 in the last 30 days · 3.4 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Visibility
6 statute miles
Lowest ceiling
3,700 ft broken
Temperature
63 °F, dew point 54 °F
Altimeter
30.01 inHg
Observed at
KPDK

Docket · 4

The files NTSB released with the investigation on October 21, 2019, on NTSB’s docket system: statements, records, photos and specialists’ reports. 6.3 MB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.