Air carrier flight crew reported following a wind shear escape maneuver; responding to a resolution ...

Narrative:

Shortly after take-off on the gap departure we received a windshear warning. We complied with the windshear escape maneuver. We were empty; bleeds closed for first flight so by the time we exited the windshear warning we were climbing nearly 6;000 fpm. We returned to course; started to clean up the aircraft and climb to assigned altitude of 10;000 feet. During this time I was trying to check in with ATC; ATC finally responded with traffic alert; instructions to maintain 5;000 feet and a left turn. We leveled the aircraft at 5;000 feet and made the left turn. At about the same time we received an RA (resolution advisory) for traffic at 12 o'clock. The 5;000 feet level off silenced the RA. When we landed; we were asked to call norcal TRACON. I called and we were informed that we were on the wrong departure frequency. We were on 120.9 and supposed to be on 135.1. On taxi out the first officer (first officer) told me 120.9 for departure. I looked on the gap chart and it said 120.9 for northwest departures. In my mind this verified the correct frequency. On our pre departure clearance (pre-departure clearance) however it did say 135.1 departure frequency and we both missed it. Cause was not thoroughly reading entire pre departure clearance. So very important to make sure to read entire pre departure clearance and confirm info and settings with the other pilot.

Original NASA ASRS Text

Title: Air carrier flight crew reported following a wind shear escape maneuver; responding to a Resolution Advisory event while communicating to ATC on incorrect frequency. Reportedly; frequency required on departure procedure can be confusing.

Narrative: Shortly after take-off on the GAP departure we received a windshear warning. We complied with the windshear escape maneuver. We were empty; bleeds closed for first flight so by the time we exited the windshear warning we were climbing nearly 6;000 fpm. We returned to course; started to clean up the aircraft and climb to assigned altitude of 10;000 feet. During this time I was trying to check in with ATC; ATC finally responded with traffic alert; instructions to maintain 5;000 feet and a left turn. We leveled the aircraft at 5;000 feet and made the left turn. At about the same time we received an RA (Resolution Advisory) for traffic at 12 o'clock. The 5;000 feet level off silenced the RA. When we landed; we were asked to call Norcal TRACON. I called and we were informed that we were on the wrong Departure frequency. We were on 120.9 and supposed to be on 135.1. On taxi out the FO (First Officer) told me 120.9 for Departure. I looked on the GAP chart and it said 120.9 for NW departures. In my mind this verified the correct frequency. On our PDC (Pre-departure Clearance) however it did say 135.1 Departure frequency and we both missed it. Cause was not thoroughly reading entire PDC. So very important to make sure to read entire PDC and confirm info and settings with the other pilot.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1552690
Time
Date	201806
Local Time Of Day	1201-1800
Place
Locale Reference	NCT.TRACON
State Reference	CA
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Medium Transport
Operating Under FAR Part	Part 121
Flight Phase	Takeoff
Route In Use	SID GAP7
Flight Plan	IFR
Person 1
Function	Captain Pilot Not Flying
Qualification	Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP)
Person 2
Function	Pilot Flying First Officer
Qualification	Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine
Events
Anomaly	Conflict Airborne Conflict Deviation - Procedural Published Material / Policy

Air carrier flight crew reported following a wind shear escape maneuver; responding to a resolution advisory event while communicating to ATC on incorrect frequency. Reportedly; frequency required on departure procedure can be confusing.