ERA11CA296

NTSB accident investigation · Boeing 737-732 · Atlanta, GA · May 12, 2011

Accident · No injuriesData collectionFinal report
Date
May 12, 2011, 18:05 local (22:05 UTC)
Place
Atlanta, GA
Injuries
298 uninjured
Phase of flight
Taxi
Aircraft
N308DEBoeing 737-732N378DABoeing 737-832
Defining events
Taxi: Ground collisionTaxi-from runway: Ground collision
Weather
Visual (VMC) · Day
Status
Completed · report February 23, 2012
Report
Approved by Office Director
NTSB office
Eastern Region Aviation
Parties
Delta Airlines, FAA Delta CMO
FAA report
20110512030362I
Case key
79093

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 B737-700 pilot did not maintain adequate wing tip clearance while taxiing around the stopped B-737-800.

Findings · 2

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.

N308DE · Boeing 737-732

Action: unnecessary actionPersonnel issues › Action/decision · PilotBoeing 737-732: 1 caseAll aircraft: 52 casesProbable cause

N378DA · Boeing 737-832

Action: unnecessary actionPersonnel issues › Action/decision · Pilot of other aircraftBoeing 737-832: 1 caseAll aircraft: 52 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.

N308DE · Boeing 737-732

N378DA · Boeing 737-832

Analysis

The captain of a B737-800 had taxied to the entry of the assigned parking ramp where he stopped and waited for the ground crew to clear the parking area, post wing walkers, and give him the signal to park. The captain of a B737-700, which was following the B737-800, requested, through the ramp controller, that the stopped airplane move forward so that his airplane could pass. The B737-800 taxied forward and stopped again. The captain of the B737-700 then attempted to pass the B737-800, and the left winglet struck the B737-800’s right elevator, substantially damaging it.

Factual narrative

The captain of the Boeing B737-700 reported that he was cleared to follow a company B737-800 to the ramp. The B737-800 captain reported that he was cleared to gate E3, however he needed to hold his position near gate E1 so that ramp personnel could prepare the gate for arrival. The captain of the B737-700 realized that his airplane was blocking the taxiway at the entry to the ramp, so he relayed a request through ramp tower to have the B737-800 move forward. Ramp tower relayed the request, and the captain of the B737-800 reportedly moved forward about 20 to 30 feet. The captain of the B737-700 began to taxi around the right side of the B737-800, but reported that the B737-800 did not taxi forward as far as he expected. The captain of the B-737-700 was concerned with the clearance between his left wingtip and the tail and the right wingtip of the B737-800. While shifting his attention between his wingtip and the B-737-800, he felt the shudder as the upper part of B737-700 left winglet contacted the outer part of the B737-800 right elevator. Substantial damage occurred to the right elevator of the B737-800.

Aircraft · 2

Registration
N308DE
Reported as
Boeing 737-732
Category
Airplane
Serial number
29656
Airframe hours
5,497
Engines
CFM International CFM56-7826/3, 26,000 lbs thrust, turbo fanCFM International CFM56-7826/3, 26,000 lbs thrust, turbo fan
Damage
Minor damage
Flight
Part 121
Operator
Delta Airlines Inc
Registered owner
Delta Airlines Inc
Airworthiness certificate
Standard, Transport
Last inspection
AAIP · May 10, 2011
Departed
TGU · Tegucigalpa
Destination
ATL · Atlanta, GA
Flight plan
IFR
Airport
ATL · Hartsfield - Jackson Atlanta

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.

Registration
N378DA
Reported as
Boeing 737-832
Category
Airplane
Serial number
30265
Airframe hours
36,281
Engines
CFM Intl. CFM56 SERIES, 2,200 horsepower, turbo jetCFM Intl. CFM56 SERIES, 2,200 horsepower, turbo jet
Damage
Substantial damage
Flight
Part 121
Operator
Delta Air Lines Inc
Registered owner
Delta Air Lines Inc
Airworthiness certificate
Standard, Transport
Last inspection
AAIP · May 10, 2011
Departed
SDQ · Santo Domingo
Destination
ATL · Atlanta, GA
Flight plan
IFR
Airport
ATL · Hartsfield - Jackson Atlanta

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 · 4

As NTSB recorded them. NTSB leaves out names.

Role
Pilot, aircraft N308DE
Age
52
Injuries
None
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Unknown
Last flight review
November 2, 2010
Seat
Left
Flight hours
14,406 total · 4,841 in this make and model · 208 in the last 90 days
Role
Co-pilot, aircraft N308DE
Age
52
Injuries
None
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Unknown
Last flight review
October 5, 2010
Seat
Right
Flight hours
6,428 total · 2,589 in this make and model · 191 in the last 90 days
Role
Pilot, aircraft N378DA
Age
59
Injuries
None
Certificate
Airline transport
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Unknown
Last flight review
October 13, 2010
Seat
Left
Flight hours
15,230 total · 7,438 in this make and model · 179 in the last 90 days
Role
Co-pilot, aircraft N378DA
Age
55
Injuries
None
Certificate
Airline transport
Airplane ratings
Multi-engine land, Single-engine land
Instrument ratings
Airplane
Medical
Class 1, Unknown
Last flight review
October 16, 2010
Seat
Right
Flight hours
11,082 total · 4,351 in this make and model · 232 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 8 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
88 °F, dew point 55 °F
Altimeter
29.94 inHg
Observed at
ATL

Docket · 6

The files NTSB released with the investigation on December 29, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 8.6 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.