NCAA Instrument Rating Theory case studies
NCAA Instrument Rating Theory · Put your knowledge to work in context.
The NCAA Instrument Rating Theory examination is the knowledge test that the Nigerian Civil Aviation Authority sets for pilots seeking to fly under instrument flight rules. It is aimed at commercial and private pilots who already hold the relevant licence and now need the instrument privileges that allow flight in cloud, at night, and in controlled airspace under IFR. The NCAA Instrument Rating Theory case studies are 5 cases and about 4,521 words.
1Radio failure in IMC: applying the lost-communication procedure
You are the sole pilot of a Piper PA-34 Seneca on an IFR flight from Lagos (DNMM) to Kano (DNKN), level at FL190 in instrument meteorological conditions. At 1405Z, 60 NM south of Kano, the controller clears you: "Five November Alpha, maintain FL190, direct Kano VOR, expect further clearance at 1435." At 1407Z the number one VOR/ILS receiver fails, and while you are troubleshooting it the audio panel dies: you can neither transmit nor receive.
914 words, about 5 min2Alternate selection and fuel-endurance shortfall on a 270 NM sector
You are planning a twin turboprop flight from Abuja (DNAA) to Lagos (DNMM), 270 NM, true airspeed 210 kt, fuel flow 240 kg/h in the cruise. Forecast wind at FL180 is 215/30, giving a 30 kt headwind component.
859 words, about 4 min3Squall line at departure with the weather radar deferred
You are due to depart Kano (DNKN) for Port Harcourt (DNPO) at 1710 local time in a pressurised twin turboprop, planned FL180, estimated time en route 2 hours 10 minutes, with Owerri as alternate at 25 minutes. The aircraft's weather radar failed two days ago and has been deferred under the minimum equipment list with the restriction that the aircraft is not to be operated into areas of forecast or reported convective activity.
894 words, about 4 min4Night go-around: fatigue, medication and a somatogravic illusion
It is 0240 local time. You are flying a single-pilot night charter in a pressurised single turboprop, on your third sector of the day; you have been awake since 0600 the previous morning and have logged 9 hours of flight time in the last 24 hours.
880 words, about 4 min5Glideslope unserviceable, a displaced threshold and a missed-approach gradient that cannot be met on one engine
You are the pilot in command of a twin turboprop, landing weight 6,200 kg, Vref 115 kt, arriving at an aerodrome of elevation 320 ft in moderate rain. The ILS to runway 05 is serviceable only as a localizer: a NOTAM says the glideslope is unserviceable.
974 words, about 5 min