Aircraft Maintenance Editing and Proofreading Services

The minimum equipment list entry says "APU inoperative, deferred, category B." It does not say that the aircraft cannot depart for airports above six thousand feet elevation without it, or that the deferral has nine days left to run, or what happens if the connecting crew simply reads the placard and assumes it means the aircraft can go anywhere. A deferred defect is not a closed item; it is a condition, and a condition with the conditions left off it is a defect waiting to reoccur somewhere nobody expected.

We edit what maintenance organisations and engineers produce — minimum equipment list and deferred defect entries, maintenance release and certificate of release to service wording, technical log entries and shift handover notes, non-routine work card write-ups, reliability and trend reports, maintenance manual amendment and bulletin drafting, and the correspondence with a regulator or manufacturer about a recurring fault. Our editors work on the sentence a crew reads before deciding whether to fly.

The deferred defect entry is what determines whether a limitation is actually observed or quietly forgotten, and its failure is a category code with the operating conditions left implicit. Category B means nothing to a crew who has not memorised the manual. We work through these so the actual operational limitation is spelled out in the entry itself — routes affected, performance penalty, altitudes or airports excluded — rather than left to be looked up, since a limitation that requires a lookup is a limitation that gets missed during a fast turnaround; so the time remaining on the deferral is stated as a date, not a category, given that "category B" means ten days to somebody who knows the manual by heart and nothing to a relief crew reading it for the first time; so the write-up distinguishes a fault confirmed and understood from one that could not be reproduced, because these carry very different risk and a report that reads the same for both invites the same response to each; so a recurring fault is flagged as recurring rather than logged fresh each time, as three separate "intermittent" write-ups for the same system are a pattern that a fresh log entry hides; so the handover between shifts states what was done and what was deliberately not done, given that an incomplete task handed over silently is indistinguishable from a completed one; and so any workaround devised to keep an aircraft flying is recorded with its actual justification, since an undocumented workaround becomes an undocumented assumption for the next person. Entries written this way keep a limitation a limitation rather than letting it become an accident report.

Everything you send is treated in confidence, including technical records, fault histories and correspondence with regulators or manufacturers. We are editors rather than licensed engineers or regulators, and we offer no view on airworthiness, fault diagnosis or compliance. What we can do is make sure the record says exactly what the next person needs to know.