FAA BGI common mistakes
FAA BGI · Understand the traps and how to avoid them.
Treating the waiver/authorization conditions as a single blanket permission and flying a night or beyond-visual-line-of-sight operation under an approval that only covers daylight visual-line-of-sight work.
Candidates memorize the regulation number but not the structure of the authorization: the operating limits, the applicable part, and which conditions are waivable versus fixed. They assume an approval for one operation extends to adjacent operations.
What to do instead
Build a one-page matrix of the operating rules you fly under, with columns for daylight only, VLOS only, altitude cap, speed cap, over-people restrictions, and required equipment. For each cell note whether it can be waived and under what part. Before any flight, walk the planned profile against that matrix and confirm every deviation is explicitly authorized in writing.
Filing or accepting a remote pilot certificate application without verifying the identity and English-proficiency attestation steps, or assuming recurrent training can be substituted by logged flight hours alone.
The certificate and recurrent-training pathway has changed several times, and candidates study from older material that describes a different knowledge-test or training route. They conflate currency with certification.
What to do instead
Study the current certification pathway from the primary source: eligibility, identity verification, the knowledge test or approved training route, and the recurrent training interval. Write out the exact steps in order and the documents required at each step. Separate the concept of certificate validity from the concept of recent operating experience in your notes.
Planning a flight by drawing a straight line to the destination and ignoring airspace classes, special use airspace, and temporary flight restrictions along the route.
Candidates practice with simple point-to-point problems and treat airspace as a destination concern rather than a corridor concern. They also forget that restrictions can be issued on short notice.
What to do instead
Make a route-corridor check a fixed step: sectional review along the entire path, class of airspace at each segment, special use airspace status, and a TFR check within the required window before flight. Practice by planning three routes and writing the airspace class for every segment, not just the endpoints.
Underestimating the effect of wind on the small unmanned aircraft and planning endurance from the manufacturer's advertised flight time.
Advertised endurance comes from benign test conditions. Candidates plan with that number and do not account for headwind on the outbound leg, hover time, or reserve. They also assume a tailwind outbound will be available for the return.
What to do instead
Plan the outbound leg into the wind and compute the return leg separately using the worst-case wind. Apply a reserve of at least the time needed to reach a safe landing area plus margin. Recompute on site with observed winds, and set a hard turnaround point based on remaining power rather than on distance remaining.
Loading the aircraft and computing performance without recalculating center of gravity and total weight after adding a payload, gimbal, or battery change.
Candidates treat weight and balance as a one-time check on the original configuration. Accessory changes are seen as minor, so the cumulative effect on stability, control authority, and endurance is not recomputed.
What to do instead
Establish a standard configuration sheet listing every component with its weight and arm. Recompute total weight and center of gravity whenever anything changes. Verify the result falls within the manufacturer's limits and note how the change affects endurance and control response. Practice with two or three payload configurations.
Answering performance questions using density altitude and wind as independent factors rather than combining them into a single takeoff and climb assessment.
Study material presents each factor separately, so candidates solve one variable at a time. In the real environment high density altitude and a tailwind act together on climb performance and groundspeed.
What to do instead
Work combined scenarios: compute density altitude from field elevation and temperature, then assess climb rate and groundspeed with the planned wind. Compare the result against obstacle clearance and available runway or launch area. Do at least five combined problems before the exam and write the reasoning chain rather than just the final number.
Treating the preflight inspection as a checklist recital without verifying control response, compass calibration status, and battery condition specific to the planned flight.
Candidates rehearse the checklist order but not the purpose of each item. They skip the items that require interpretation, such as battery voltage sag under load or a calibration that has not been done since a location change.
What to do instead
For each inspection item, write one sentence on what a failure would look like in flight and what the corrective action is. Add a location-change check for compass calibration and a load test for batteries. Practice the inspection out loud, explaining the purpose of each step rather than reading the list.
Responding to an in-flight emergency by continuing toward the original objective while troubleshooting, instead of executing a pre-briefed contingency.
Candidates memorize emergency categories but never define decision points. Under stress they default to completing the mission, and the loss-of-link or low-battery response is improvised.
What to do instead
Pre-brief three contingencies before every flight: loss of link, low power, and a person entering the operating area. For each, state the trigger, the automated behavior, the manual action, and the landing site. Rehearse the triggers verbally before launch so the decision is made before the emergency.
Assuming right-of-way rules and see-and-avoid responsibility transfer to other traffic or to the observer, and failing to brief the observer's role.
Candidates learn the right-of-way list as a memorized order but do not translate it into an operating procedure. The observer is treated as a passenger rather than an active crew member with a defined scan sector and communication protocol.
What to do instead
Convert the right-of-way rules into a briefing script: who yields to whom, what the remote pilot does, and what the observer does. Define the observer's scan sector, the phraseology for traffic calls, and the immediate action on a call. Practice the briefing until it takes under two minutes and covers all traffic categories.
Ignoring physiological and environmental stressors such as heat, glare, dehydration, and fatigue when assessing fitness to fly a long or repetitive operation.
Candidates equate fitness to fly with the absence of illness or medication. They do not consider that a small unmanned aircraft operation can involve hours of standing in sun with sustained visual attention.
What to do instead
Add a personal fitness checklist to the preflight: hydration, rest in the previous 24 hours, heat exposure, eye fatigue, and medication. Set a maximum continuous operating period and a rest break. Treat any degraded attention as a reason to land and reassess rather than to push through the remaining task.