Structure: ‘Participle clauses’

When are participle clauses used?

Skilled writers — particularly in journalism, safety reporting and academic prose — often replace full subordinate clauses with shorter participle clauses. The result is denser, more formal prose that packs context, cause and chronology into half the words.

A participle clause begins with a participle (a verb form ending in -ing or -ed, or an irregular past form like broken, taken, found) rather than a finite verb.

Consider how the same idea reads with and without the participle:

• The FAA directive was published on 14 May. It requires operators to replace the clamp before 18 June.
• Published on 14 May, the FAA directive requires operators to replace the clamp before 18 June.

The second version is the kind of sentence you would find in an FAA bulletin or a Flight International feature — and it is what an Advanced-level aviation professional should be able to write, not just decode.

The three main forms

Present participle clause (-ing) — for an action happening at the same time, an ongoing state, or a cause:

Citing a documentation gap, the FAA ordered all A350 operators to comply by 18 June.

Past participle clause (-ed / irregular) — almost always with a passive meaning:

Sourced from a new manufacturer, the replacement clamp requires a different locking torque.

Perfect participle clause (having + past participle) — for an action completed before the main clause:

Having reviewed the documentation gap, the FAA issued a mandatory airworthiness directive.

How they work

Two rules make participle clauses behave properly.

Rule 1 — shared subject. The participle clause and the main clause must share the same subject. Approaching the runway, the gear failed is wrong; the gear was not approaching. Approaching the runway, the crew noticed that the gear had failed is right.

Rule 2 — they replace one of three things:

1. A time clause (when / while / after / before) — After the FAA reviewed the documentation gap… → Having reviewed the documentation gap, the FAA…
2. A reason clause (because / since / as) — Because it was concerned about the risk… → Concerned about the risk, the FAA…
3. A relative clause (who / which / that) — The clamp which was replaced last year… → The clamp replaced last year…

Try these

Rewrite each sentence using a participle clause. Every item is drawn from last week’s airworthiness directive story, so the vocabulary should already be familiar.

1. The FAA published the directive on 14 May 2026. It requires operators to address an undocumented change in a maintenance specification.
2. The original clamp became obsolete. It was replaced by a new component sourced from a different manufacturer.
3. Because Airbus failed to update the maintenance procedure, it left technicians applying the wrong locking torque.
4. The new clamp, which is sourced from a different manufacturer, requires a different locking torque.
5. After the FAA had reviewed the documentation gap, it issued a mandatory airworthiness directive.
6. Delta operates 39 A350 aircraft. It is the largest US operator of the type.
7. The episode exposes a hidden gap between design and maintenance. It invites renewed scrutiny of configuration management practices.
8. The EASA directive mirrors the FAA mandate. It reflects a coordinated transatlantic approach.

A few cautions

• Do not overuse them. A page of participle clauses reads like a thesis abstract. Two or three per paragraph is plenty.
• Watch for ambiguity. Approaching the runway, the aircraft’s landing gear failed to deploy is fine; Approaching the runway, the gear failed dangles — the gear is not approaching.
• Perfect participle is not the same as past participle. Reviewed the documentation, the FAA… sounds like the FAA was reviewed. Use Having reviewed the documentation, the FAA…

Once you’re comfortable with participle clauses, see Structure: ‘Relative clauses 2’ — participle clauses often shorten the very relative clauses described there.