Safety recommendation
NTSB Recommends FAA Change Transponder Status for MSAW Safety
NTSB recommends FAA modify transponder status for VFR aircraft during emergency assistance.
The NTSB recommends that the Federal Aviation Administration require controllers in terminal radar facilities, when providing emergency assistance to a VFR aircraft that has been assigned a transponder code which allows a computer status change but inhibits the minimum safe altitude warning (MSAW), to change the computer status of that aircraft so that the MSAW alarm feature is not inhibited.
Original regulatory source: https://data.ntsb.gov/carol-main-public/sr-details/A-89-111