FAA Aircraft Dispatcher (ADX)Navigation and ATCEasy
A pilot submits a PIREP reporting moderate turbulence at FL280. What is the primary purpose of this report to the National Airspace System?
- ATo provide other pilots and ATC with real-time observed weather conditions not available from ground-based sources
- BTo satisfy a regulatory requirement for logging flight time
- CTo adjust the airport's terminal forecast automatically
- DTo update the aircraft's maintenance discrepancy log
Show answer & explanationAnswer & explanation
Correct answer: A. To provide other pilots and ATC with real-time observed weather conditions not available from ground-based sources
Pilot reports (PIREPs) provide actual, real-time in-flight weather conditions such as turbulence, icing, and cloud tops that cannot be measured by ground-based instruments, helping other pilots, dispatchers, and ATC make informed decisions.
Why the other options are wrong
- B. PIREPs are not for logging flight time; that's a separate recordkeeping function.
- C. Forecasts (TAFs) are not automatically altered by individual PIREPs; forecasters may use them as data.
- D. PIREPs concern weather conditions, not aircraft maintenance issues.
Pilot Report (PIREP)
A report from a pilot describing actual in-flight weather conditions encountered, transmitted to ATC/FSS for dissemination to other users.
- Includes location, time, altitude, aircraft type, and conditions like turbulence/icing
- Urgent PIREPs (UUA) report severe turbulence, icing, wind shear, or low-level windshear
- Filled out using the standard PIREP format elements
Memory trick: 'Pilots Inform Real-time Environmental Perceptions' — real data from real skies.