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Author Topic: Delta 311 Heavy SFO Runway 10 Left - Terrain Warning Go Arounds  (Read 2920 times)

Offline Squawk 7700

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Delta 311 Heavy SFO Runway 10 Left - Terrain Warning Go Arounds
« on: December 28, 2021, 01:51:05 PM »
Delta Airlines Flight 311 JFK New York to SFO San Francisco, Boeing 767-332(ER) Reg: N169DZ
Two consecutive mandatory Go Arounds into San Francisco RNAV Runway 10 Left due to GPWS false terrain warnings.
Recording includes SFO Tower, NorCal TRACON, and Atlanta company dispatch and maintenance. Aircraft diverted to Oakland.
Monday December 20, 2021 8:43 PM local.



Offline diskus

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Re: Delta 311 Heavy SFO Runway 10 Left - Terrain Warning Go Arounds
« Reply #1 on: December 29, 2021, 08:24:22 AM »
Thats a rare approach at KSFO, nice catch :-D

Offline Danno_FZ1

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Re: Delta 311 Heavy SFO Runway 10 Left - Terrain Warning Go Arounds
« Reply #2 on: December 29, 2021, 11:46:15 PM »
That was a really great pull!  I've not heard much Ops traffic before.  It dawned on me while I was listening that GPWS uses a radar altimeter that we recently learned is in the same frequency range as the new 5G cell service.  This is the type of issue we might expect from that interference.  It's more likely to be something on that specific aircraft but it would be really interesting to find that a cell carrier just put a tower online nearby.

Offline diskus

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Re: Delta 311 Heavy SFO Runway 10 Left - Terrain Warning Go Arounds
« Reply #3 on: December 30, 2021, 08:32:15 AM »
Interestingly it seems about three hours later the same plane flew from OAK to SFO and landed rwy 10, so they must have fgured it out.