UPS MD11 near Swift Current on Jun 28th 2018, unreliable airspeed

Last Update: July 4, 2018 / 20:01:41 GMT/Zulu time

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Incident Facts

Date of incident
Jun 28, 2018

Classification
Incident

Airline
UPS

Flight number
5X-72

Departure
Louisville, United States

Destination
Anchorage, United States

Aircraft Registration
N255UP

Aircraft Type
McDonnell Douglas MD-11

ICAO Type Designator
MD11

A UPS United Parcel Service McDonnell Douglas MD-11, registration N255UP performing flight 5X-72 from Louisville,KY to Anchorage,AK (USA) with 2 crew, was enroute at FL360 about 30nm eastsoutheast of Swift Current,SK (Canada) when the crew received an "Indicated Airspeed" warning on both the captain's and first officer's primary flight display. The crew declared emergency and descended the aircraft to FL320. The "Unreliable Airspeed" checklist was worked during which the crew determined the Air Data Computer (ADC) #1 was unreliable. The crew switched the data sources to ADC #2 and the indications returned to normal, the "Indicated Airspeed" Warning extinguished. The crew continued the flight to Anchorage for a safe landing about 3.5 hours later.

The Canadian TSB reported the #1 ADC was replaced, the system checks were then satisfactory.
Aircraft Registration Data
Registration mark
N255UP
Country of Registration
United States
Date of Registration
EcnqfnjklAem Subscribe to unlock
TCDS Ident. No.
Cnjlk Subscribe to unlock
Manufacturer
MCDONNELL DOUGLAS
Aircraft Model / Type
MD-11F
Number of Seats
M Subscribe to unlock
ICAO Aircraft Type
MD11
Year of Manufacture
IgbA Subscribe to unlock
Serial Number
Mfnge Subscribe to unlock
Aircraft Address / Mode S Code (HEX)
NmfAAg Subscribe to unlock
Engine Count
J Subscribe to unlock
Engine Manufacturer
QA Subscribe to unlock
Engine Model
Qgkki njmlnf Subscribe to unlock
Engine Type
Nmqqfchhm Subscribe to unlock
Pounds of Thrust
lAif Subscribe to unlock
Main Owner
L hAhijdfjepqqkqcjngApjApjqhbnjmbqnbhjjjAkhmllghkfkhbjpcfkdhhmfpplneqdqjeqmgdnbmh bAAjjnnllfnnggflbedbqAdhmAlcgn Subscribe to unlock
Incident Facts

Date of incident
Jun 28, 2018

Classification
Incident

Airline
UPS

Flight number
5X-72

Departure
Louisville, United States

Destination
Anchorage, United States

Aircraft Registration
N255UP

Aircraft Type
McDonnell Douglas MD-11

ICAO Type Designator
MD11

This article is published under license from Avherald.com. © of text by Avherald.com.
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