B737-700 flight crew reported taxiing without completing the before taxi checklist; due in part to d...

Narrative:

Due to thunderstorms in the area; the pushback was delayed and performed without headsets. During pushback; ground control told us to contact clearance delivery for possible routing change. We completed the pushback/engine start and cleared off the ground crew. We contacted clearance delivery and they informed us of a new controller pilot data link communications (cpdlc) clearance we needed to acknowledge. Due to weather on the departure corridor; we spent approximately five minutes and multiple different clearance changes before we received our final clearance and sorted out the cpdlc confusion. We then performed a waypoint by waypoint review of the clearance to ensure we had all proper points. We were satisfied we had the correct routing and called for taxi. During taxi out we realized we had not performed the before taxi flows or done the before taxi checklist; flaps were not set. I stopped the aircraft; we performed the flows and checklist and confirmed the aircraft was properly configured. The rest of the flight was uneventful.the complexity and confusion of the multiple clearance changes put us out of the normal flow of operation. We just need to be more vigilant to checklist discipline when our normal triggers are interrupted.

Original NASA ASRS Text

Title: B737-700 flight crew reported taxiing without completing the Before Taxi checklist; due in part to distraction and confusion with the CPDLC Pre-Departure Clearance procedure.

Narrative: Due to thunderstorms in the area; the pushback was delayed and performed without headsets. During pushback; Ground Control told us to contact Clearance Delivery for possible routing change. We completed the pushback/engine start and cleared off the Ground Crew. We contacted Clearance Delivery and they informed us of a new Controller Pilot Data Link Communications (CPDLC) clearance we needed to acknowledge. Due to weather on the departure corridor; we spent approximately five minutes and multiple different clearance changes before we received our final clearance and sorted out the CPDLC confusion. We then performed a waypoint by waypoint review of the clearance to ensure we had all proper points. We were satisfied we had the correct routing and called for taxi. During taxi out we realized we had not performed the Before Taxi flows or done the Before Taxi Checklist; flaps were not set. I stopped the aircraft; we performed the flows and checklist and confirmed the aircraft was properly configured. The rest of the flight was uneventful.The complexity and confusion of the multiple clearance changes put us out of the normal flow of operation. We just need to be more vigilant to checklist discipline when our normal triggers are interrupted.

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	1386891
Time
Date	201609
Local Time Of Day	0001-0600
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	Mixed
Aircraft 1
Make Model Name	B737-700
Flight Phase	Taxi
Flight Plan	IFR
Person 1
Function	Pilot Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Not Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Deviation - Procedural Published Material / Policy

B737-700 flight crew reported taxiing without completing the before taxi checklist; due in part to distraction and confusion with the cpdlc pre-departure clearance procedure.