EASA SIB 2014-08R1: Cold Soaked Fuel Frost Dispatch

What to do

Operators of Boeing 737NG aircraft intending to conduct take-offs with CSFF should develop detailed operational procedures and training programs based on the simplified procedure approved in the updated AFM. Flight crews must verify that all AFM conditions and limitations are met before dispatch and request de-icing or delay departure if there is any doubt. The pilot in command retains final authority to ensure safe operation under these conditions.

Summary

EASA Safety Information Bulletin 2014-08R1 is an operations bulletin addressing Cold Soaked Fuel Frost (CSFF) dispatch procedures for Boeing 737 Next Generation (NG) models, including the 737-600, 737-700, 737-800, 737-900, and 737-900ER. It provides updated guidance on conducting take-offs with CSFF on wing surfaces in accordance with the approved Airplane Flight Manual (AFM) limitations and conditions. The bulletin clarifies regulatory expectations and operational procedures for safe dispatch in cold weather conditions.

What changed

EASA SIB 2014-08R1 revises and replaces the original SIB 2014-08 by introducing a newly approved simplified procedure for dispatching Boeing 737NG aircraft with CSFF. This simplified procedure removes the need to measure frost thickness and instead relies on easily verifiable environmental conditions as prerequisites. The update aligns European guidance with FAA exemptions and Boeing's revised procedures to facilitate safer and more practical operations.

Why it matters

This bulletin is important because it provides operators and flight crews with clearer, more practical procedures to safely conduct take-offs with cold soaked fuel frost, reducing operational complexity and potential safety risks. Strict adherence to the updated conditions and limitations ensures compliance with EU regulations and helps maintain aircraft performance and controllability. It supports consistent international standards and operational safety for commercial air transport using Boeing 737NG aircraft.