737 CSFF Hack 1.2

Screenshots

Description

This app is a study guide and a visual representation to aid in the understanding around the many scenarios when Cold Soaked Fuel Frost (CSFF) is encountered on the wing of a 737.

This app is not approved for use during flight operations.

Some airlines may not allow for a "Secondary Ice Inspection", check company materials for availability of this procedure.

The CSFF guidance in this app is designed around a North American Airline Flight Handbook and reference to the Boeing FCOM. This app is not a substitute for company flight manuals, an FAA approved deicing program, Boeing FCOM guidance or good judgement.

Version history

1.2

2023-03-07

watchOS
Fixed incorrect wording regarding precipitation from "Visible Moisture" to "No Visible Moisture".

Added (3mm) depth for under wing frost to better adhere to metric values.

Minimum deployment target is now watchOS 9.0

iOS
Added image of Fuel Stick 4 for greater awareness of where under wing frost may affect upper wing frost. Thank you Thomas.

Added metric value of 3mm at header caution note.

1.1.4

2023-02-04

Increased visual emphasis on first line of the app which declares the assumption that 1/8" of frost was discovered on the lower portion of the wing.

1.1.3

2023-01-22

Updated the icon used when fuel temperature is greater than or equal to -16C to better align with the other icons.
Updated the wording regarding upper wing frost.
Changed reset logic of the Yes/No buttons to allow viewing the conditions after the alert has been presented.
Updated the "Reset" button to say "Reset All" to more clearly define what will get reset.

1.1.2

2022-10-30

A backend code update to ensure continued support for iPad16 and iOS16 and beyond.

1.1.1

2021-12-04

Clarified description under the Frost Inside CSFF area image to state that acceptable criteria must be met.

Backend code improvements and testing to ensure future app stability.

1.1

2021-10-13

With the winter months nearly upon us in our region this update adds a few example images for reference. Tap the "eye" icon to see photos of the Cold Soaked Fuel Frost (CSFF) area on top of the wing, as well as underwing frost in the vicinity of the fuel tank. Finally a photo of acceptable frost within the CSFF area is shown.

I've also fixed a bug where some text would truncate on smaller screens.

1.0.2

2021-09-19

Overall this is a minor update preparing the App for iOS15.

Adjusted the alignment of the definition of Visible Moisture to better coincide with the question.

Fixed an issue on watchOS where the "Frost Inside CSFF / Upper Wing Clean" selection picker would not display properly.

1.0.1

2021-07-15

This update fixes a minor display issue where toggling Yes/No on the environmental conditions would cause the text and images to move slightly.

I've also done some background code optimization.

-Dan O'Leary

1.0

2021-02-26