✈️ Aviation Brief — Issue #64
Weekly insights for student pilots and the instructors who train them.
THIS WEEK'S TOPIC
IA.IV.D — Altitude and Heading Changes (Instrument Rating ACS)
1. ACS STANDARDS SUMMARY
For IA.IV.D, the examiner expects you to change altitude and heading smoothly and accurately using only instrument references. You must maintain coordinated flight while entering, maintaining, and exiting standard-rate turns and straight climbs or descents. The tolerances are: altitude ±100 feet, heading ±10 degrees, airspeed ±10 knots. You must demonstrate a logical cross-check, prompt corrections, and proper use of pitch, bank, and power without chasing the needles.
2. THREE COMMON STUDENT MISTAKES
- Fixating on the heading indicator or altimeter and letting bank or pitch drift unnoticed.
- Over-banking during heading changes, then fighting the resulting altitude loss with abrupt pitch inputs.
- Failing to lead the rollout by half the bank angle (typically 15° lead on a standard-rate turn), resulting in consistent heading overshoots.
3. CFI PRO TIP
Teach students to fly in “segments of ten.” Change heading in 10-degree increments and altitude in 100-foot steps, pausing briefly after each correction to let the aircraft stabilize and the scan resume. This simple habit reduces over-control and builds disciplined instrument interpretation.
4. SAFETY SPOTLIGHT
Altitude deviations during heading changes remain a frequent ASRS report category in the IFR environment. Many pilots become momentarily distracted while rolling out on a new heading and lose 200–300 feet before catching the error—enough to trigger a TCAS resolution advisory or, in high terrain areas, a dangerous low-altitude excursion.
5. DID YOU KNOW
A standard-rate turn changes heading at 3° per second, so a 30° heading change takes exactly 10 seconds once established—handy for precise timing when ATC gives “turn 30 degrees left” instructions.
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