Alaska B738 at Portland on Oct 16th 2023, mistaken instruction leads to loss of separation

Last Update: October 23, 2023 / 07:56:37 GMT/Zulu time

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Incident Facts

Date of incident
Oct 16, 2023

Classification
Incident

Flight number
AS-1299

Aircraft Registration
N508AS

Aircraft Type
Boeing 737-800

ICAO Type Designator
B738

Airport ICAO Code
KPDX

An Alaska Airlines Boeing 737-800, registration N508AS performing flight AS-1299 from Santa Ana,CA to Portland,OR (USA), was on final approach to Portland's runway 28L when the crew performed a go around from low height about 100 feet AGL due to weather conditions. Tower instructed the Boeing to maintain runway heading and climbed to 3000 feet, which was read back.

At that time a Skywest Airlines Embraer ERJ-175 on behalf of Delta Airlines, registration N304SY performing flight DL-3978 from Portland,OR to Seattle,WA (USA), was accelerating for takeoff from Portland's runway 28R.

After the Embraer became airborne, the controller transmitted the instruction "Skywest 3978, when able start your right turn 340", however, the Boeing read the instruction back (Alaska 1299) and began to turn to the right. Tower upon recognizing the wrong aircraft began to turn right immediately instructed "AS-1299, fly runway heading" followed shortly by "Alaska 1298, fly heading 270" twice, however, without response, the Boeing began to turn left. Tower transmitted traffic information about the Embraer, the Boeing crew acknowledged, now tower again instructed "fly runway heading, maintain 3000 feet" which the crew read back and turned the aircraft back onto the extended runway center line.

The Boeing subsequently diverted to Redmond,OR (USA) for a safe landing, the Embraer continued to Seattle for a safe landing.

The FAA is investigating the occurrence.

According to ADS-B data the separation reduced to about 300 feet vertically and 0.26nm horizontally.




Metars:
KPDX 170053Z 21007KT 10SM FEW015 SCT035 BKN080 17/13 A3003 RMK AO2 SLP167 T01720128=
KPDX 162353Z 27009KT 10SM FEW005 SCT022 BKN035 18/14 A3000 RMK AO2 RAE33 SLP157 P0025 60053 T01830144 10200 20156 53011=
KPDX 162325Z 25006KT 6SM -RA BR FEW002 SCT020 OVC035 18/16 A2999 RMK AO2 P0025 T01780156=
KPDX 162317Z 27006KT 3SM R10R/6000VP6000FT RA BR FEW002 SCT015 OVC029 17/16 A2999 RMK AO2 P0023 T01720156=
KPDX 162312Z 27006KT 3/4SM R10R/5500VP6000FT +RA BR FEW002 SCT015 OVC029 17/16 A2999 RMK AO2 P0017 T01720156=
KPDX 162301Z 24006KT 1 1/2SM R10R/3500VP6000FT RA BR FEW002 SCT013 OVC029 17/16 A2998 RMK AO2 P0000 T01720156=
KPDX 162253Z 21006KT 3SM RA BR FEW002 SCT015 OVC029 17/16 A2998 RMK AO2 RAB2158 SLP151 P0028 T01720156=
KPDX 162248Z 26007KT 4SM -RA BR SCT015 BKN033 OVC047 17/16 A2998 RMK AO2 RAB2158 P0027=
KPDX 162237Z 30013KT 1SM R10R/4500VP6000FT +RA BR BKN020 BKN038 BKN060 17/16 A2997 RMK AO2 RAB2158 P0014 T01720156=
KPDX 162234Z 31011KT 2SM R10R/4500VP6000FT +RA BR BKN027 BKN038 BKN060 17/16 A2997 RMK AO2 RAB2158 P0009 T01720156=
KPDX 162232Z 31011KT 2SM R10R/4500VP6000FT +RA BR SCT027 BKN038 OVC060 17/16 A2997 RMK AO2 RAB2158 P0007 T01720156=
KPDX 162153Z 18011G17KT 10SM SCT024 BKN030 BKN046 20/14 A2996 RMK AO2 LTG DSNT NE SLP144 CB DSNT NE T02000144=
KPDX 162140Z 18008KT 10SM BKN028 BKN037 20/14 A2996 RMK AO2 T02000144=
KPDX 162053Z 19007KT 10SM SCT019 BKN039 BKN065 19/14 A2996 RMK AO2 SLP146 60000 T01940144 58004=
KPDX 161953Z 18008KT 150V210 10SM SCT015 BKN021 BKN055 19/16 A2999 RMK AO2 SLP155 T01940156=
KPDX 161853Z 11007KT 10SM SCT009 BKN015 OVC080 16/14 A2999 RMK AO2 RAE13 SLP154 P0000 T01610139=
Aircraft Registration Data
Registration mark
N508AS
Country of Registration
United States
Date of Registration
Lecgqgmdnlkkj Subscribe to unlock
Manufacturer
BOEING
Aircraft Model / Type
737-890
Number of Seats
ICAO Aircraft Type
B738
Year of Manufacture
Serial Number
Aircraft Address / Mode S Code (HEX)
Engine Count
Engine Manufacturer
Engine Model
Engine Type
Pounds of Thrust
Main Owner
CdAnhhkknhfcpdlbglqnqppbg gqdfhpplhkkedeAdndAcgfhpighklhplAhfpikjc ch leAnbnli q hdfilbbflmj bk empqmj Subscribe to unlock
Incident Facts

Date of incident
Oct 16, 2023

Classification
Incident

Flight number
AS-1299

Aircraft Registration
N508AS

Aircraft Type
Boeing 737-800

ICAO Type Designator
B738

Airport ICAO Code
KPDX

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