NASA · Aviation Safety Reporting System
Embraer Phenom 300 pilot reported a loss of the Attitude and Heading Reference System resulting in uncontrolled dutch roll at cruise altitude related to a possible military GPS jamming exercise. The pilots did not slow down or reduce altitude, but regained control after a period of time.
What is ASRS?
The Aviation Safety Reporting System is NASA's voluntary, confidential, non- punitive incident-reporting system, established 1976. Pilots, controllers, dispatchers, and maintenance technicians file reports describing safety- relevant events. NASA de-identifies every report before adding it to the public database. Reports are not investigated by NASA, the FAA, or the NTSB — they represent the reporter's perspective.
Pilot narrative
Verbatim from the de-identified NASA record. First-person account by the
reporter. NASA strips identifying details (names, company, specific time);
anonymization placeholders are ZZZ,
X, Y.
At FL450 approximately 100 miles north of LAS, a Phenom 300 lost control due to a military radar jamming exercise. Both AHRS units dropped off line, as well as the GPS receivers, and the airplane entered an uncontrolled dutch roll. The pilots did not slow down at first, nor did they go down in an attempt to regain control. The event lasted about 20 minutes. With both AHRS units off line, of course, the yaw damper and autopilot are unavailable tools, as well as many other related systems. The military either stopped the jamming exercise or the airplane flew out of range of the jamming exercise, and the aircraft systems slowly restored themselves.
NASA classification — Anomalies
- Aircraft Equipment Problem
- Deviation / Discrepancy - Procedural
- Inflight Event / Encounter
NASA classification — Assessments
- Contributing Factors / Situations
- Aircraft · ATC Equipment / Nav Facility / Buildings · Human Factors · Procedure · Software and Automation
- Primary Problem
- Software and Automation
ASRS reports are voluntarily submitted, de-identified by NASA, and represent the reporter's perspective. The presence of reports on a topic cannot be used to infer prevalence in the National Airspace System. The authoritative source is the NASA ASRS Database Online at asrs.arc.nasa.gov ↗.