FAA Clears Boeing 737-10 for Certification Despite FMS Software Issue

The FAA has decided not to require Boeing to update its 737 MAX flight management system (FMS) software as a prerequisite for certifying the 737-10. This decision was made by a panel of internal safety experts on October 2, and it alleviates concern that the 737-10 and recently certified 737-7 will face a mandatory update before entering service.

The issue in question is related to automated guidance during missed approaches, which can affect the flight computers. The FAA determined that this issue is not a safety concern because pilots retain full control of the aircraft and the indications to the flight crew are clear and unambiguous. Boeing will issue a special bulletin detailing how to recognize and respond to the malfunction.

The FAA also plans to issue a special bulletin underscoring Boeing's instructions. Boeing and software vendor GE Aerospace are working on an update to the FMS software, which is currently in version U14.1. This version is compatible with the 737-7 and 737-10, which is nearing FAA approval.

Some pilots and human-factors experts have expressed concern about adding workload during missed approaches, but a recent simulator scenario conducted by one 737 operator found that pilots were able to manage the situation well. However, it did take some effort.