B737 Undifferentiated or Other Model
Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 236; Flight Crew Total 10838; Flight Crew Type 8129
Deviation / Discrepancy - Procedural Published Material / Policy; Ground Event / Encounter Other / Unknown
Flight Crew Returned To Gate; General Flight Cancelled / Delayed
Company Policy; Weather; Procedure
We de-iced at the gate. Using the ACARS; snow was indicated at the beginning of deicing. Holdover time 140 minutes with Type 4. During process; precipitation changed to FZDZ (Freezing Drizzle); new ACARS showed holdover time the same. Neither of these indicated the need for any type of wing check. When start time was given to us by deicing; precipitation was reported as nil. On taxi out; I noticed a small patch of ice adhering to the nose; just below and down from my wiper. I asked the First Officer to perform a wing check (not called for by any ACARS paperwork). He returned reporting a large area of ice on top of the wing aft of Engine 2. We coordinated a return to gate for deicing. We received another round of deicing and reinitiated our departure.
B737 Captain reported that after deicing in freezing drizzle conditions ice was noted on the aircraft nose. A wing check revealed the need for additional deicing.