Date: 202005
Local time of day: 0001-0600
Location: ZZZ.Airport, US
Flight conditions: VMC
Light: Daylight
Aircraft: B737 Undifferentiated or Other Model
Operator: Air Carrier
Operating under: Part 121
Flight plan: IFR
Mission: Ferry / Re-Positioning
Flight phase: Taxi
Aircraft component: Aircraft Auto Temperature System
Component problem: Failed
Reporter organization: Air Carrier
Reporter function: First Officer; Pilot Flying
Reporter qualification: Flight Crew Air Transport Pilot (ATP); Flight Crew Instrument; Flight Crew Multiengine
Human factors: Communication Breakdown
Second reporter function: Captain
Anomaly: Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Maintenance; Deviation / Discrepancy - Procedural MEL / CDL; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR
Detector: Person Flight Crew
When detected: Taxi
Result: General Maintenance Action
Contributing factors: Procedure; MEL; Manuals; Aircraft; Logbook Entry
Primary problem: Procedure

Narrative: We were flying a maintenance Ferry from ZZZ to ZZZ1 for storage. I was the Pilot Flying. We received a normal maintenance MFD for the flight and had all paperwork in hand. All events were normal and uneventful until accomplishing Final Items Checklist. This was accomplished on the taxiway enroute to the active runway. Upon recall of the 6 pack lights/Master Caution recall; all Cabin Temp zone lights came on as well as Air Conditioning Master Caution light. We held short of the runway on a different taxiway to trouble shoot. We called local ZZZ Maintenance and described the event. They told us to contact [Maintenance Control]. The Captain used his cell phone to call Dispatch and get a phone patch to [Maintenance Control]. All three were on the phone. The phone was in his left hand and up to his left ear. I was monitoring ground freq with my headset on. My headset covers both ears. I uncovered my left ear in an attempt to hear the conversation and learn something. It was determined by [Maintenance Control] that they could defer the maintenance issue and we were good to go without a new MFD. The Captain specifically asked; multiple times; if we were good to go and whether or not we needed a new MFD. He was told that we did NOT need a new one. We put deferral stickers by the Zone Temp Control switches and annotated the new write up in the log book. We completed all of the clean up items and took off for ZZZ1. The remainder of the flight was uneventful. After landing in ZZZ1; the Captain received a phone call from the [Chief Pilot] stating that we needed to write [a report] because [Maintenance Control] should have made us get a new MFD. [Maintenance Control] acknowledged the mistake and took full responsibility for what happened.. That is why I am writing this now.


Second narrative: We flew this leg with an invalid MFD. Prior to taking the runway; we did a Master Caution Recall IAW SOP. It resulted in illumination of all three zone temp hard lights. Upon consulting with [Maintenance Control] and Dispatch; the [Maintenance Control] made two [Risk Management] system entries covering the issues; referenced the MEL; deferred both issues; and issued two log page numbers for us to notate on overhead panel deferral stickers. I then consulted further with the [Maintenance Control] with regard to whether we needed a new MFD. He checked with his system and determined that our previous MFD was still valid. I asked him to verify that the station; sequence and date on the MFD he was showing as active was the same as the station; sequence and date on the MFD we had on board. He verified that they matched and that we were ok to go without a new MFD; so we did. After landing at ZZZ1; I received a call from the [Chief Pilot] advising that [Maintenance Control] had been mistaken and that we should have been issued a new MFD.


Synopsis: Flight crew and Maintenance reported departing without the correct ferry permit because of the addition of an MEL prior to departure.