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Printed page label not indexed. PDF page 29.
was adjusted down to match these values. The EPR indication on this engine the read 1.70 with the engine anti-ice switch OFF. The N., No, EGT, and F/F were also noted for an unblocked Pt, probe when the engine throttleOpen official document at PDF page 29NTSB AAR-82/08: Air Florida Boeing 737-222 N62AF
Printed page label not indexed. PDF page 31.
"4 Cha f & 5. \ “nti, nw Engine Instrument Indication: Engine Instrument Indication: 1.70 EPR Pro probe blocked 2.04 EPR Engine anti-ice-Off Normal Operation Figure 6.-Comparison of Instrument Readings -- 1.70 EPR vs. 2.04 EPR.Open official document at PDF page 31NTSB AAR-82/08: Air Florida Boeing 737-222 N62AF
Printed page label not indexed. PDF page 32.
being developed by the accident aircraft was about 10,750 pounds net thrust per engine (1.70 EPR) and not the target value of 14,500 pounds net thrust per engine (2.04 EPR), a thrust level corresponding to 1.70 EPR was used inOpen official document at PDF page 32NTSB AAR-82/08: Air Florida Boeing 737-222 N62AF
Printed page label not indexed. PDF page 34.
indicate an EPR of about 2.04 with the engine actually operating at an EPR ratio of 1.70. Under these circumstances, a pilot would unknowingly attempt takeoff at a considerably lower thrust than desired. However, the pilot has available other indicationsOpen official document at PDF page 34NTSB AAR-82/08: Air Florida Boeing 737-222 N62AF
Printed page label not indexed. PDF page 52.
developed presuming an ice blocked Pty probe would equate to an (unblocked Pt, probe) EPR of 1.70. The corresponding” engine rotational speed for this reduced thrust level correlated closely with the engine rotational speeds actually developed on the accident aircraftOpen official document at PDF page 52NTSB AAR-82/08: Air Florida Boeing 737-222 N62AF
Printed page label not indexed. PDF page 53.
Boeing Co. for the actual thrust levels indicated by the CVR sound spectrum analysis (1.70 EPR). The acceleration and climb performance theoretically achievable by the B-737 were then compared with the best known takeoff roll and flight trajectory information forOpen official document at PDF page 53NTSB AAR-82/08: Air Florida Boeing 737-222 N62AF