NYC99LA023

NTSB accident investigation · McDonnell Douglas MD-88 · Covington, KY · October 11, 1998

Accident · No injuriesLimited investigationFinal report
Date
October 11, 1998, 18:54 local (22:54 UTC)
Place
Covington, KY
Injuries
121 uninjured
Damage
Substantial damage
Phase of flight
Taxi
Aircraft
N997DLMcDonnell Douglas MD-88
Weather
Visual (VMC) · Day
Status
Completed · report September 28, 1999
Report
Approved by Office Director
Case key
45390

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

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Probable cause

The tug driver's failure to maintain a proper visual lookout.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

On ground/water collision with objectTaxi - to takeoff
Object - vehicle
Visual lookout - not maintainedGround personnelCause

Analysis

The airplane pushed back from the gate and started to taxi, when the crew saw a baggage tug traveling at a fairly high rate of speed approaching from the right side of the airplane. With the tug driver looking to his right and nowhere else, and without ever slowing down or turning the tug impacted the right side of the airplane causing substantial damage. Two months prior to the accident the tug driver received a total of 30 hours of training. Topics for the training were, ramp and operation self directed training, dangerous goods handling, basic ramp procedures, and driver training.

Factual narrative

On October 11, 1998, about 1854 eastern standard time, a McDonnell Douglas MD-88, N997DL, operated by Delta Airlines as Flight 1726, sustained substantial damage when it was struck by a baggage tug while taxiing for takeoff at Cincinnati/Northern Kentucky International Airport (CVG), Covington, Kentucky. The 2 flight crewmembers, 5 flight attendants, 114 passengers, and the tug driver were not injured. Instrument meteorological conditions prevailed and an instrument flight rules flight plan had been filed for the scheduled passenger flight that was conducted under 14 CFR Part 121.

In a written statement, the captain stated that the airplane was taxiing west abeam "B12" and "B10," when he and the first officer saw a "bag tug" approaching. The tug was between the "A" and "B" concourses moving at a fairly high rate of speed, with the driver looking away from the airplane. The captain added that the driver was unaware of the airplane. The captain and first officer then applied maximum braking and the airplane "was almost stopped" when the tug impacted the side of the airplane.

According to a passenger, the airplane pushed back from the gate and started to taxi for the runway, when she saw a tug "quickly" approaching from the right. She could also see that the tug driver was looking to his right and nowhere else. She continued, "He never slowed down, never turned. He drove under the plane, right under us, full speed. I thought we crushed him. He reappeared, windows broken, metal superstructure of tug listing and drove rapidly away." The passenger added that, "I think he had earphones on.

According to company records, the tug driver received a total of 30 hours of training in the month of August. The training covered, ramp and operation self directed training, dangerous goods handling, basic ramp procedures, and driver training.

The tug driver's employment was terminated after the accident and he was not available for comment nor did he submit a statement.

Aircraft

Registration
N997DL
Reported as
McDonnell Douglas MD-88
Category
Airplane
Serial number
53364
Airframe hours
17,620
Engine
P&W JT8D219, 19,000 lbs thrust, turbo fan
Damage
Substantial damage
Flight
Part 121
Registered owner
Delta Air Lines Inc.
Airworthiness certificate
Standard, Transport
Last inspection
Continuous airworthiness · March 12, 1998 · 12 hours before
Departed
CVG
Destination
CLE · Cleveland, OH
Flight plan
IFR
Airport
CVG · Cincinnati/North Kentucky

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

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
43
Certificate
Airline transport
Airplane ratings
Multi-engine land
Instrument ratings
Airplane
Medical
Class 1, Valid Medical--no waivers/lim.
Seat
Left
Flight hours
10,000 total · 2,225 in this make and model · 200 in the last 90 days

Weather

Conditions
Visual (VMC) · Day
Wind
90° at 7 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
64 °F, dew point 46 °F
Altimeter
30.00 inHg
Observed at
CVG