Embraer Phenom 100
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Flight Crew Last 90 Days 50; Flight Crew Total 3400; Flight Crew Type 350
Training / Qualification; Human-Machine Interface
Aircraft Equipment Problem Less Severe; Deviation - Altitude Undershoot; Deviation / Discrepancy - Procedural Published Material / Policy
Flight Crew Returned To Clearance
Aircraft; Human Factors; Procedure
The EAGUL5 arrival can be misleading for aircrew and could result in an unsafe position. If an aircrew were to pass HOMRR just below 16;000 FT; in accordance with the arrival procedure; and then be required to be between 11;000 and 10;000 FT within four miles; an unsafe descent rate could ensue (1;500 FT/NM or > 6;000 FT/min). Avionics systems read 'HOMRR at or below 16;000 FT' to be '16;000;' and when calculating ability to be between 11;000 and 10;000 FT in four miles; determines that it cannot be done and thus reads unable. Please consider altering the STAR to allow a more gradual descent.
Phenom 100 Captain reports that his FMC incorrectly reads the HOMRR crossing restriction on the EAGUL5 RNAV to PHX as a hard altitude instead of 'at or below' as depicted. This makes the VNNOM crossing restriction impossible to achieve.