A minor change to the PMDG Boeing 737 startup procedures

An eagle eyed reader spotted a small mistake in the PMDG Boeing 737 startup procedures this morning. During engine start, the crew should wait until the APU has spun the engines up to 25% N2 (rotational speed of the high pressure compressor shaft) before introducing fuel - to ensure efficient ignition.

The interesting thing? Back when I first wrote the procedure, a real-world 737 captain checked it. I remember him being more concerned with correct use of language and sequencing - although obviously in the real aircraft the speeds and temperatures are monitored closely during engine start.

While reading about N2, I inevitably fell down something of a rabbit hole - learning that in specific conditions - high altitude in-flight re-starts for example - the engines can be started at far lower RPM.

Anyway.

The procedures are updated!

Boeing 737-600
https://ko-fi.com/s/0cfba4769e

Boeing 737-700
https://ko-fi.com/s/00425a9f80

Boeing 737-800
https://ko-fi.com/s/dd709fc710

Boeing 737-900
https://ko-fi.com/s/9a44bd7078