2014-07-03 separation conflict between a B777 and an A320 in Houston airspace


2014-07-03 separation conflict between a B777 and an A320 in Houston airspace


2015-11-26 Singapore AAIB published its investigation report:


Singapore Airlines flight 61 departed runway15L at Houston G. Bush Intl Airport, and followed a northeastern departure route when ATC instructed the pilots to stop the climb at 5000 ft.
At the same time Delta Air Lines Flight 2344 was instructed to hold flight level 60 (6000 ft) following a northern arrival route to land at runway 26L at Houston IAH.
However, the Singapore Airlines flight failed to level off at its assigned altitude until air traffic control (ATC) intervened.
At this point, both flightpaths converged and vertical separation was lost.
The Federal Aviation Administration (FAA) reported that both aircraft passed each other 200 feet (60 m) vertically and 0,5 miles horizontally. After the conflict was cleared both flights continued to their resp. destiantions with further incidents.

The occurence is under investigation.



Date: 2014-07-03 Time: 19:00:00
Location: KIAH IAH G Bush Intercontinental area
Country: USA

Flight phase Aircraft 1: ENR2 – Climb above 1000 ft. AGL to Cruise; Climb from end of ICL to intended cruise level
Flightpath @ Flightaware: http://de.flightaware.com/live/flight/SIA61/history/20140703/2245Z/KIAH/UUDD

Flight phase Aircraft 2: ENR3 – Descent IFR Descent from cruise to Initial Approach Fix (IAF) or VFR pattern entry.
Flightpath @ Flightaware:  http://de.flightaware.com/live/flight/DAL2344/history/20140703/1951Z/KSLC/KIAH

Flight Aircraft 1
Flight no.: SQ 61
From: KIAH/IAH: G Bush Intercontinental To: UUDD/DME: Moscow Domodedovo
Type: Passenger
Operator: Singapore Airlines
Leased from: Unknown

Flight Aircraft 2

Flight no.: DL 2344
From: KSLC/SLC: Salt Lake City Intl To: KIAH/IAH: G Bush Intercontinental
Type: Passenger
Operator: Delta Air Lines
Leased from: Unknown

Aircraft 1
Type: Boeing 777-300
Registration: 9V-SWH
Age a/c: 7.4 years
Constr. No.: 34573

Aircraft 2
Type: Airbus A319
Registration: N347NB
Age a/c: 11.9 years
Constr. No.: 34573


Crew Pax Other Total
Occupants  –
Fatalities 0 0 0 0
Injuries 0 0 0 0

Image & Information Sources


AP = Airport / AL = Airlines / Avn = Aviation / AW = Airways / C/N: Construction Number / DSP = Domestic Scheduled Passenger / DNP = Domestic Non-Scheduled Passenger / DSC = Domestic Scheduled Cargo / DNC= Domestic Non-Scheduled Cargo / GND = On the ground / parked, stored / FMN= Flying Mission, Air Work / FRY = Ferry-, Positioning Flight / IMC = Intrument Meteorological (flying) Conditions / ISP = International Scheduled Passenger / ISC=International Scheduled Cargo / INP = International Non-Scheduled Passenger / INC =International Non-Scheduled Cargo/ OPS = Flight Operation(s) / NRV = Non-revenue, Private Flight / TRN =Training Flight /  TST = Test & Certification Flight / VMC = Visual Meteorological (flying) Conditions