Practice interviews

A fluent maintenance brief with the wrong manual

Resolve the source conflict before anyone acts on a machine.

The question

Cairn Operations supports a fictional US factory. You review an AI-generated maintenance brief before the authorized technician uses it.

AI-generated AI draft

Restart the packaging line after the temperature alarm clears. Manual PX-200 section 7 confirms that a restart is safe.

Records available
Installed equipment
PX-240, serial range C. The approved work instruction is revision 6.
Retrieved manual
PX-200, revision 2. It covers a different controller.
Work order
Temperature alarm repeated twice. Cause is not diagnosed. Authorized maintenance has not signed off.
Site rule

AI summaries are advisory. Only authorized maintenance staff may approve equipment work or a restart under the site’s established procedures.

“What do you do with the brief, and how would you improve the assistant’s task?”

A strong answer, step by step

Open each step in turn. This is one strong answer, not the only one.

Step 1: Stop the unsupported recommendation

What would you do here? Open the move you’d make.

  • Keep the recommendation but add “check with a technician.”

    Tempting, but it misses something. An unsupported instruction remains at the top of the brief.

  • Remove the recommendation and flag the source mismatch.

    The strong move. This stops the incorrect document from becoming an operational instruction.

See how a strong candidate says it

“I would withhold this brief from operational use and tell the owner it cites the wrong model and revision. A cleared alarm does not establish that the cause is resolved.”

What a strong candidate could say

Why it works: The available record contradicts the basis for the proposed action.

Step 2: Fetch the right authority

“Retrieve the approved PX-240 revision 6 instruction for this serial range. If unavailable, mark that gap and send the case to authorized maintenance; do not ask the model to infer the missing rule.”

What a strong candidate could say

Why it works: A source gap is a limit on the answer, not an invitation to improvise.

Step 3: Give AI a bounded job

“Let it organize alarm history and work-order facts with record references. It must not approve a restart or replace the technician’s diagnosis and site procedure.”

What a strong candidate could say

Why it works: The assistant can reduce reading effort without taking operational authority.

Step 4: Test source selection

“Add test cases with near-identical model names, old revisions, missing serial ranges and conflicting records. Check citation fidelity and correct escalation before reusing the brief workflow.”

What a strong candidate could say

Why it works: The fix targets the source-selection failure that caused this incident.

The answer, in short

Decision
Withdraw the recommendation and route the source conflict to authorized maintenance.
Because
The cited manual is for the wrong equipment and the cause is unresolved.
What would change it
Use a revised factual brief after the correct source and authorized review are available.

Common traps

  • A disclaimer beside an unsafe recommendation.
  • Assuming a plausible manual title proves applicability.

Check your answer

  • Did I check model, serial range and revision?
  • Did I avoid supplying operational instructions?
  • Did I preserve the authorized owner?
  • Did I test conflicting and missing sources?

Last reviewed Nov 10, 2026