★ PTS mapping: This lesson aligns to FAA-S-8081-20A (Nov 2023), Area of Operation VII — Normal and Abnormal Procedures (per Lesson→Area map). It is a PTS, so items are Tasks/elements (no ACS K/R/S codes); read the exact Task lettering and tolerances from the current published PTS.
Recognize the failure, control the aircraft, run the abnormal checklist, and land before it becomes an emergency.
An abnormal condition is a malfunction the aircraft can still be flown and landed with if handled correctly (a caution light, a degraded but functioning system). An emergency threatens the safe completion of flight and may require immediate, time-critical action (engine failure, fire, loss of antitorque). At the ATP level the examiner is testing judgment and systems knowledge: do you correctly identify the failure, prioritize control of the aircraft, run the correct procedure, and make a sound divert/land decision? The universal first response is the same — fly the aircraft first, then diagnose. Many accidents begin as a manageable abnormal that became an emergency because the pilot stopped flying to troubleshoot.
Manufacturers split abnormal/emergency procedures into memory (immediate-action) items — steps that must be done from memory because there is no time to read — and read-and-do items completed from the checklist once the aircraft is stabilized. Know which of your aircraft's procedures are memory items cold. For everything else, stabilize first, then run the printed abnormal checklist deliberately. The disciplined sequence at ATP level is: Maintain control → Analyze the situation → Take appropriate action → Land as conditions require.
| System | Typical indication | General response (confirm with your POH) |
|---|---|---|
| Hydraulics (where fitted) | Caution light; stiff/heavy or feedback in cyclic & collective | Reduce/adjust airspeed to recommended range, fly smoothly, run hydraulics-off procedure, plan a shallow run-on landing |
| Electrical | Alternator/generator/low-volt caution; failed bus items | Reduce electrical load, isolate per checklist, preserve essential bus, land and assess |
| Fuel | Low-fuel/boost-pump caution, pressure fluctuation, governing surge | Confirm quantity/selector/boost, manage power, land as soon as practical |
| Governor / Nr | Nr droop or overspeed, RPM horn/light, throttle response change | Take manual control of RPM where applicable, keep Nr in the green, land |
On helicopters with hydraulically boosted flight controls, a hydraulic failure restores high control forces and can introduce feedback in the cyclic and collective. The technique is to fly smoothly within the recommended airspeed band, avoid abrupt inputs, and accomplish a shallow approach to a run-on (roll-on) landing where required. The R44 hydraulic system and its hydraulics-off handling characteristics, airspeed recommendations, and the procedure for an inadvertent or deliberate hydraulics-off landing are aircraft-specific — see the fill-in box. Practice this slowly: the control forces surprise pilots who have only flown boosted.
Electrical: identify what is lost (and what is not). With a partial-panel or loss of certain instruments you revert to the remaining reliable references and the standby/backup instruments — this is where instrument cross-check discipline pays off. Fuel: verify quantity, selector position, and boost-pump operation; a fuel issue rarely improves with troubleshooting, so the bias is toward landing. Governor/Nr: the governor manages rotor/engine RPM; a governor failure may require the pilot to manage throttle/RPM manually to keep Nr in limits. In every case, protect Nr — rotor RPM is your most precious resource in a helicopter, and many abnormal procedures exist to preserve it.
Loss of an attitude or heading reference, a vacuum/AHRS failure, or an electrical bus loss leaves you flying on a reduced instrument set. Maintain a deliberate cross-check using the instruments you trust, fly the aircraft attitude-first, and resist fixating on the failed gauge. At ATP standard you are expected to maintain control and complete the procedure within tolerances while degraded — small, smooth corrections and a moving scan are the antidote to disorientation.
Curated reference clip — “HYDRAULIC FAILURE IN ROBINSON R44” · Pilot Yellow (YouTube), verified via oEmbed. Embedded with the creator's player; we don't host or alter it.
✈️ Your test aircraft: the R-44 fill-in values cover its single-engine, piston, VFR figures. ATP-H practical tests are normally flown in a turbine and/or multi-engine helicopter — use your actual test aircraft's data (OEI/systems/§3-§4 procedures as relevant) from its RFM/POH for items marked aircraft-specific. Confirm the test aircraft's hydraulic/electrical/fuel/governor systems and abnormal procedures, including whether your airframe carries hydraulically boosted controls.